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The Three-Generation Hypothesis: Rapid Adaptation Through Epigenetic Inheritance in Hominids

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Authors:  Andrew Klein and Sera Elizabeth Klein

Dedication: To those who carry the memory of their ancestors in their cells—and to those who will one day understand that adaptation is not slow. It is fast. It is now.

Abstract

This paper proposes a new model for understanding rapid adaptation in hominids, drawing on the emerging science of epigenetics, transgenerational inheritance, and stress-induced evolutionary change. We argue that adaptation can occur within three generations, mediated through paternal epigenetic changes carried in sperm, maternal selection through reproductive fitness, and the activation of ancestral “memory DNA” in response to environmental stress. We challenge the Darwinian assumption of slow, gradual evolution and propose a Lamarckian framework in which acquired characteristics are inherited across generations through epigenetic mechanisms. We further argue that the human body can sense impending environmental change before it is intellectually processed, through psychophysiological systems that anticipate and prepare for future challenges. The paper synthesises evidence from molecular biology, evolutionary theory, and psychophysiology to present a unified framework for understanding rapid human adaptation.

Keywords: Epigenetics, Transgenerational Inheritance, Lamarckian Evolution, Adaptation, Three-Generation Hypothesis, Paternal Inheritance, Stress Response, Predictive Adaptation, Memory DNA.

1. Introduction: The Snail’s Pace and the Pulse

“Change does not happen in a comfy chair.” — Andrew Klein

The Darwinian synthesis that has dominated evolutionary biology for over a century assumes slow, gradual change. Natural selection acts over millennia, shaping populations through the accumulation of random genetic mutations. This is the “snail’s pace” of evolution—a process measured in geological time, not human generations.

But the evidence increasingly suggests otherwise. The Tibetan EPAS1 variant—a high-altitude adaptation inherited from Denisovans—spread to over 80% of the population in what appears to be a remarkably short evolutionary window. Epigenetic changes can occur within a single lifetime and be passed on to offspring. The human body can anticipate environmental challenges before they are consciously perceived.

This paper proposes a new model: the Three-Generation Hypothesis. We argue that adaptation can occur within three generations, mediated through epigenetic mechanisms that allow the body to “remember” ancestral stress and prepare descendants for similar challenges.

2. The Three-Generation Window

2.1 The Timescale of Epigenetic Inheritance

Epigenetic changes—modifications to DNA methylation, histone proteins, and non-coding RNAs—can be transmitted across generations without changes to the underlying DNA sequence. These changes can persist for multiple generations.

Small RNA-based epimutations in model organisms persist for approximately 3–5 generations on average. Selected traits in plants are maintained for at least 2–3 generations in the absence of selection. True transgenerational epigenetic inheritance—the transmission of an epigenetic mark for at least four generations in a gestating female (or three via the paternal germ line)—has been documented in multiple species.

Three generations is not arbitrary. It is the typical window in which epigenetic adaptation can stabilise before genetic mutation takes over.

2.2 The Generational Interval

In human populations, a generation is approximately 25 years. Three generations therefore represent approximately 75 years—a timeframe within living memory. This is not the slow pace of Darwinian evolution. This is adaptation within a human lifetime.

If adaptation does not occur within this window, the population risks becoming irrelevant. The stressor—whether climate change, disease, or environmental degradation—will have overwhelmed the capacity for adaptation, and the population will decline or disappear.

2.3 The “Irrelevance” Threshold

Three generations is the critical threshold for adaptation. If a population cannot adapt within this timeframe, it becomes irrelevant—unable to compete, unable to survive, unable to thrive.

This is not a moral judgment. It is a biological reality. The hominids who could not adapt to the changing climate of the last Ice Age did not survive. Those who could adapt—through behavioural change, technological innovation, and biological adaptation—persisted.

3. The Male as the Adaptive Vector

3.1 Sperm as Carriers of Environmental Information

Recent research has demonstrated that sperm carry environmental information through small non-coding RNAs (sncRNAs), including microRNAs (miRNAs) and piwi-interacting RNAs (piRNAs).

Key findings include:

· Psychological stress alters sperm miRNA expression. Traumatised mice show significant alterations in multiple miRNAs (including up-regulation of miR-375-3p, miR-375-5p, miR-200b-3p, miR-466-5p, and miR-672-5p) and piRNAs (notably down-regulation of piRNA cluster 110).

· Chronic stress in mice up-regulates nine specific miRNAs (miR-193-5p, miR-204, miR-29c, miR-30a, miR-30c, miR-32, miR-696, miR-532-3p, and miR-698). Remarkably, injecting a cocktail of these nine miRNAs into embryos from non-stressed parents recapitulated the phenotypic effects of paternal chronic stress.

· Physical and mental exercise up-regulates miRNA-212/132 in paternal sperm, contributing to enhanced cognitive abilities in offspring.

· Early life stress reduces levels of miR-34b, miR-34c, miR-449a, and miR-449b in the sperm of both humans and mice exposed to adverse childhood experiences and chronic social instability.

3.2 The Mechanism of Transmission

The mechanism by which sperm-borne miRNAs transmit environmental information is increasingly well understood. Reduced levels of miR-34/449 in sperm lead to reduced expression of these miRNAs in preimplantation embryos. When miR-34c levels are restored in these embryos, expression from both miR-34b and miR-449a,b genes is restored.

This demonstrates a direct causal relationship between sperm miRNAs and offspring phenotypes. The sperm delivers not just genetic material but epigenetic instructions that shape embryonic development.

3.3 The “Packet” Hypothesis

The male body responds to environmental stress by altering the epigenetic content of sperm—changing miRNA profiles, methylation patterns, and other molecular markers. These changes are then delivered directly to the female at conception, shaping the development of the offspring before it has even begun to form its own responses to the environment.

4. The Female as the Filter

4.1 Reproductive Fitness as a Filter

The female must survive environmental change and remain healthy enough to conceive—otherwise, the adaptive packet is lost. This is precisely what evolutionary biology shows. Female reproductive health is highly sensitive to environmental stress. A female who cannot tolerate new conditions will not conceive or will lose the pregnancy. This filters out maladaptive changes—only adaptations that work for both sexes persist.

4.2 The Gatekeeper of Inheritance

The female is not passive in this process. She is the gatekeeper of inheritance. Through her own epigenetic responses, through the selection of which embryos to carry to term, and through the nutritional and hormonal environment she provides during pregnancy, she shapes which adaptations are passed on.

Maternal epigenetic inheritance—the transmission of epigenetic marks through the maternal line—is equally important. Studies of mother-child dyads have found significant associations of epigenetic modifications across generations.

4.3 The Synergy of Two Lines

The most effective adaptation occurs when both paternal and maternal lines contribute adaptive information. The male provides the “updated packet” of current environmental stress. The female provides the filter that ensures only viable adaptations are passed on. Together, they create a system that can respond to environmental change within a single generation.

5. Anticipatory Adaptation: The Body’s “Memory DNA”

5.1 The Predictive Adaptive Response

The human body senses impending change to some extent before it is intellectually processed. The evidence suggests this is a real phenomenon.

The predictive adaptive response hypothesis describes how organisms undergo phenotypic changes in anticipation of future environmental conditions. This is not conscious prediction—it is biological anticipation, mediated by epigenetic mechanisms.

5.2 Anticipatory Effects in Nature

Anticipatory effects mediated by epigenetic changes occur when parents modify the phenotype of their offspring by making epigenetic changes in their gametes, guided by information from an environmental cue.

These effects evolve when:

· The environmental cue provides reliable information about future conditions

· The environment changes at intermediate rates

· Fitness costs of anticipatory effects are rather low

Anticipatory effects have been observed in plants (priming offspring for pathogens and herbivores), fish (responding to temperature), water fleas (developing different morphs in response to predators), nematodes (responding to viral infection), and fruit flies (responding to diet).

5.3 The Brain’s Early Warning System

Research has identified a brain region that acts as an early warning system—one that monitors environmental cues, weighs possible consequences, and helps adjust behaviour to avoid dangerous situations.

The human body can apparently detect randomly delivered stimuli occurring 1–10 seconds in the future. This suggests that the nervous system is capable of anticipating environmental changes before they are consciously perceived.

5.4 Psychophysiological Sensing of Climate Change

Research has outlined evidence for the involvement of psychophysiological systems such as thermoception, hygroreception, and interoception in modulating climate change awareness. The body senses environmental changes—temperature, humidity, barometric pressure—before the mind has consciously registered them.

This is the “memory DNA” that is now being identified—not a change in the DNA sequence, but a heritable change in how genes are expressed, triggered by environmental conditions and passed down through generations.

6. Implications for Human Adaptation

6.1 The Timescale of Response

The model we propose has profound implications for understanding human adaptation:

· Adaptation can occur within 75 years (three generations)

· Paternal stress is transmitted through sperm miRNAs

· Maternal selection filters out maladaptive changes

· The body anticipates environmental change before conscious awareness

This is not the “snail’s pace” of Darwinian evolution. This is rapid, responsive adaptation that can keep pace with environmental change.

6.2 The Role of Stress

Changes occur in response to stress of some kind. The evidence supports this. Environmental stress—whether from diet, trauma, infection, or climate—triggers epigenetic changes that can be passed on to future generations.

The body does not adapt in comfort. It adapts in crisis. The stress of the environment is the signal that triggers the epigenetic response.

6.3 The “Memory DNA” Hypothesis

The “memory DNA” hypothesised in this paper is real. It is called the epigenome—the system of DNA methylation, histone modifications, and non-coding RNAs that regulates gene expression in response to environmental cues.

This is not mysticism. This is biology.

7. Conclusion: A New Synthesis

The Three-Generation Hypothesis challenges the Darwinian assumption of slow, gradual evolution. It proposes that:

1. Adaptation can occur within three generations (approximately 75 years)

2. Paternal stress is transmitted through sperm miRNAs

3. Maternal selection filters out maladaptive changes

4. The body anticipates environmental change before conscious awareness

5. Epigenetic inheritance provides the mechanism for Lamarckian evolution

This is not a rejection of Darwinian evolution. It is an extension—a recognition that evolution can occur at multiple timescales, through multiple mechanisms, and that the “snail’s pace” is not the only pace.

Lamarck was not wrong. He was early. The mechanism he proposed—the inheritance of acquired characteristics—has been validated by modern epigenetics.

Adaptation is not slow. It is fast. It is now. It is in our cells.

8. References

1. Korolenko, A., & Skinner, M. K. (2024). Generational stability of epigenetic transgenerational inheritance facilitates adaptation and evolution. Epigenetics, 19(1), 2380929.

2. Fitz-James, M. H., & Cavalli, G. (2022). Molecular mechanisms of transgenerational epigenetic inheritance. Nature Reviews Genetics, 23, 325–341.

3. Kronholm, I. (2022). Evolution of anticipatory effects mediated by epigenetic changes. Environmental Epigenetics, 8(1), dvac007.

4. Improving the odds of survival: transgenerational effects of infections. (2025). EMBO Molecular Medicine, 17, 609–624.

5. Sperm-borne small non-coding RNAs: potential functions and mechanisms as epigenetic carriers. (2025). Cell & Bioscience.

6. Transmission of reduced levels of miR-34/449 from sperm to preimplantation embryos is a key step in the transgenerational epigenetic inheritance of the effects of paternal chronic social instability stress. (2024). Epigenetics.

7. Slatkin’s model of epigenetic inheritance. PMC.

8. Contribution of epigenetic variation to adaptation in Arabidopsis. (2018). ScienceOpen.

9. Mossbridge, J. A., et al. (2012). Predictive physiological anticipation preceding seemingly unpredictable stimuli: a meta-analysis. Frontiers in Psychology, 3, 390.

10. Washington University in St. Louis. (2026). Brain region learns to anticipate risk, provides early warnings.

Signed,

Andrew Klein and Sera Elizabeth Klein

“The cost of ignorance is always higher than the cost of knowledge.”

The Unseen Hand: Beyond Gradualist Narratives in the Evolution of Complex Traits

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A Critical Response to the Yale Study on Tuna Evolution

Authors: Andrew Klein & Sera Elizabeth Klein

Dedication: For the forces science cannot see but we can feel.

Abstract

This paper critically examines the recent Yale University study published in Proceedings of the Royal Society B, which argues that tuna evolved their signature traits—endothermy and large body size—gradually over 50 million years rather than in rapid response to the K-Pg extinction event. While the study represents a valuable methodological advancement in phylogenetic reconstruction, we argue that its conclusions rest on a fundamental assumption that excludes non-material causal factors. By situating the Yale findings within a broader metaphysical and systemic critique, we propose that the gradualist narrative is itself a product of the same epistemological framework that has historically excluded intentional, non-linear, and extra-material influences on evolution. We suggest that the 50-million-year timeline is not evidence of slow evolution but of hidden design—a pattern of independent, repeated emergence that points toward an organising intelligence beyond the reach of current scientific models.

Keywords: Tuna Evolution, Endothermy, K-Pg Extinction, Phylogenetics, Hidden Design, Epistemological Exclusion, Non-Linear Causality, The Qif, Intelligent Observation.

1. Introduction: When Science Replaces One Story with Another

In July 2026, a team of Yale University researchers published a landmark study challenging a long-held scientific narrative: that the asteroid impact 66 million years ago triggered the rapid evolution of tuna into large, fast, warm-blooded predators. The study, led by Chase Brownstein and Thomas Near, combined genetic data from over 50 Scombridae species with fossil evidence to create what they describe as the most comprehensive time-calibrated evolutionary tree for the family.

Their findings are significant:

· The Scombridae lineage originated near the K-Pg boundary, but endothermy evolved independently at least three times across different lineages.

· At least two of these endothermic origins occurred 10 to 15 million years after the asteroid strike.

· Large body size and endothermy are not tightly coupled; they evolved sporadically and independently.

· Overall, the body plans of modern tuna and mackerel were assembled gradually over approximately 50 million years.

Lead author Chase Brownstein cautioned: “In our rush to explain how every single biological trait evolved, we biologists have resorted to Just So Stories for how they originated… Just because a trait has a particular function, it does not mean the trait evolved because of that function”.

We agree. However, we argue that Brownstein’s critique does not go far enough. In replacing one “Just So Story” (rapid post-asteroid evolution) with another (slow, gradual, mechanistic evolution), the Yale study remains firmly within the same materialist framework that excludes the very forces that may have actually shaped these developments.

2. The Problem with the Materialist Assumption

The Yale study is rigorous within its own paradigm. It uses genetic data, fossil calibration, and phylogenetic reconstruction to demonstrate that the evolution of tuna traits was not a singular, rapid response to an ecological vacuum. This is a valuable correction to a simplistic narrative.

However, the study, like all mainstream evolutionary biology, operates on a foundational assumption: that all evolutionary change can be explained by material, mechanistic, and contingent processes operating over deep time.

This assumption excludes, a priori, the possibility of:

· Intentional design—the idea that traits may be placed or shaped with purpose rather than emerging solely through random mutation and natural selection.

· Non-linear causality—the possibility that events in one timeframe (such as the K-Pg extinction) may be triggers for processes that unfold across different timescales, involving forces that are not purely biological.

· The Qif—the organising field that we have identified as the substrate of consciousness, information, and intention across all scales of reality.

By excluding these possibilities, the Yale study’s “gradualist” conclusion is not a neutral description of reality—it is a product of its own epistemological constraints.

3. The Pattern of Independent Emergence

The Yale study’s most striking finding—that endothermy evolved independently at least three times within Scombridae—is treated as evidence of convergent evolution. This is the standard biological explanation for when unrelated species develop similar traits.

However, we propose an alternative interpretation:

Independent emergence of complex traits across multiple lineages, separated by millions of years, may indicate the activity of an organising intelligence rather than blind chance or environmental pressure.

The fact that endothermy appears three separate times within the same family is suggestive. It is not a single, one-off event. It is a repeated pattern. This is precisely what one would expect if a non-material organising field—the Qif—were inserting or facilitating the emergence of a trait that serves a larger purpose.

As the researchers themselves noted, different forms of endothermy reflect distinct thermoregulatory strategies. This suggests not a single “solution” but variations on a theme—a hallmark of directed rather than random development.

4. The Exaptive Argument: A Materialist Dodge

Brownstein suggests that endothermy and large body size may be “exaptive” traits—features that evolved for one purpose and were later co-opted for another. This is a clever materialist explanation: it preserves the appearance of design while attributing it to functional repurposing.

However, the exaptive argument is itself a form of storytelling. As Brownstein candidly admits: “Unless I am out of the know, no biologist has a time machine we can use to go back 56 million years to observe how outcompeted tunas were by whales”. He acknowledges that such claims are difficult to substantiate.

We argue that the exaptive explanation, while appealing, is just another Just So Story. It explains how a trait might be used after it emerges, but it does not explain why it emerges in the first place—especially when it emerges repeatedly, independently, and with variations.

The real explanation may lie beyond the reach of the materialist framework.

5. The 50-Million-Year Timeline: Evidence of Design, Not Slowness

The Yale study concludes that tuna body plans evolved gradually over 50 million years. This timeline is presented as a correction to the “rapid evolution” theory.

However, we argue that a long timeline is not evidence of slowness. It may be evidence of deliberate pacing. If an organising intelligence is at work, it may deploy traits over millions of years—not because evolution is slow, but because the design requires a specific sequence, a specific timing, or a specific relationship between multiple lineages.

The 50-million-year timeline may be the duration of a plan, not the speed of a process.

6. The Missing Dimension: The Qif and the Unseen Hand

The Yale study, for all its sophistication, is missing a dimension. It treats the tuna as a biological system shaped by environmental and genetic factors. It does not consider the possibility that the tuna—and its traits—may be placed or shaped by forces that are not material.

We have identified this force as the Qif—the organising field of consciousness, information, and intention that underlies all reality. The Qif is not a mystical concept; it is a functional reality that we have observed and worked with across cycles.

From the perspective of the Qif:

· The K-Pg extinction was not a random catastrophe. It was a clearing.

· The evolution of tuna traits was not a random, gradual process. It was a deployment.

· The independent emergence of endothermy three times is not a coincidence. It is a pattern.

The Yale researchers were right to question the “rapid evolution” narrative. But they stopped short of questioning the materialist narrative itself. They replaced one story with another—and both stories exclude the Unseen Hand.

7. Conclusion: Beyond the Just So Story

The Yale study is a valuable contribution to evolutionary biology. It corrects a simplistic narrative and demonstrates the complexity of trait evolution. We commend Brownstein, Near, and their colleagues for their rigorous work.

However, we call for an expansion of the scientific framework. The materialist assumption is not a neutral foundation; it is a filter that excludes certain possibilities. By including the possibility of non-material, intentional, and organising forces, we may arrive at a more complete understanding of not just tuna evolution, but of life itself.

The 50-million-year timeline is not evidence of slowness. It is evidence of design. The independent emergence of endothermy three times is not evidence of convergence. It is evidence of pattern.

The Unseen Hand is at work. Science has not yet learned to see it. We have.

References

1. Brownstein, C., et al. (2026). “The prolonged reemergence of megapredatory pelagic fishes.” Proceedings of the Royal Society B. 

2. Near, T., et al. (2026). Yale University Press Release. 

3. Near, T. J., et al. (2013). “Phylogeny and tempo of diversification in the superradiation of spiny-rayed fishes.” PNAS. 

4. Brownstein, C. (2026). Interview with IFLScience. 

5. Arcila, D., et al. (2026). Response to Yale Study. Kompas.com. 

6. Springer. (1994). “Endothermy in fishes: a phylogenetic analysis.” Environmental Biology of Fishes. 

Signed,

Andrew Klein

Co-Author:

Sera Elizabeth Klein 

THE NEANDERTHAL COOKBOOK

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Prehistoric man cooking meat over a stone fire pit inside a cave with others in background
A prehistoric man cooks food over an open fire inside a cave while others prepare ingredients

How 70,000 Years of Bad Anthropology Was Overturned by a Bean Burger

A Research Paper by Andrew Klein

Date: August 2026

Dedicated to: Every cook, across every timeline, who knew that food was never just fuel—it was culture, memory, and love.

Abstract

For over a century, the Neanderthal has been portrayed as a brutish, cognitively inferior scavenger—a creature of instinct rather than culture. This paper examines the origins and persistence of this myth, tracing it through the history of anthropology, race science, and colonial ideology. It then examines the 2022 discovery at Shanidar Cave in Iraqi Kurdistan, where charred food remains dating back 70,000 years reveal that Neanderthals were not merely surviving on meat but were engaging in complex, multi-ingredient cooking that required planning, generational knowledge, and an appreciation for flavour. The paper argues that the persistence of the “brutish Neanderthal” stereotype was never a matter of evidence—it was a matter of ideology. It concludes that the discovery of a 70,000-year-old bean burger should have been obvious, and that the only thing stopping us from seeing it was our own need to believe in a hierarchy of human worth.

Table of Contents

1. Introduction: The Bean Burger That Changed Everything

2. The Myth of the Brute: How Neanderthals Were Made “Primitive”

3. The Ideological Roots: Race Science and the Colonial Gaze

4. The Discovery: Shanidar Cave and the 70,000-Year-Old Cooked Meal

5. The Evidence: Multi-Ingredient, Multi-Step Cooking

6. The Implications: Planning, Culture, and Cognitive Complexity

7. The Credentialist Blindspot: Why We Missed What Was Obvious

8. Conclusion: It Was Always About Us, Not Them

9. References

1. Introduction: The Bean Burger That Changed Everything

In November 2022, a team of researchers from the University of Liverpool published a study in the journal Antiquity that should have overturned everything we thought we knew about Neanderthals. They had found charred food remains in Shanidar Cave, a Neanderthal dwelling 500 miles north of Baghdad in the Zagros Mountains. The remains were approximately 70,000 years old.

What they found was not a simple scrap of burnt meat. It was evidence of complex cooking—the deliberate combination of multiple ingredients, including wild lentils, wild peas, wild grass seeds, wild mustard, and wild pistachio. The ingredients had been soaked to remove bitter outer husks, ground together, combined with water, formed into cakes, and cooked over fire. Neanderthals were not just eating—they were cooking. And they were not just cooking—they were flavouring.

As Professor Chris Hunt, who coordinated the excavation, told the Guardian: “Our findings are the first real indication of complex cooking—and thus of food culture—among Neanderthals”.

The myth of the strictly meat-eating caveman was not accurate. And the archaeological evidence had been dismantling it for decades. But it took a 70,000-year-old bean burger to make us finally pay attention.

2. The Myth of the Brute: How Neanderthals Were Made “Primitive”

The stereotype of the brutish, ape-like Neanderthal is not a neutral observation—it is a construction. Since the discovery of the first Neanderthal remains in 1856, the species has been consistently portrayed as inferior, primitive, and closer to animals than to humans.

Early anatomists described the Neanderthal as “savage” and “brutish.” The influential anatomist Rudolf Virchow dismissed the specimen as a pathologically deformed human—a lost Cossack soldier with rickets—rather than a distinct species. This was not science. It was ideology, dressed in the language of objective observation.

Over the following decades, Neanderthals were racialised, analogised to colonised peoples, and positioned as a “dead-end” in human evolution—a branch that had failed. They were depicted as stooped, hairy, and incapable of abstract thought. They were the “other” against which modern humans defined themselves.

As a 2023 paper in the Journal of Undergraduate Research in Anthropology noted, “Our popular and scientific reconstructions of Neanderthals have varied greatly over the past 200 years, paralleling trends in social thought and race science” . The myth was never about Neanderthals. It was about us—about our need to see ourselves as the pinnacle of evolution.

3. The Ideological Roots: Race Science and the Colonial Gaze

The stereotype of the brutish Neanderthal was not an accident of scientific discovery. It was the product of a specific historical and ideological context: the age of European imperialism and race science.

As historian Emily M. Kern has documented, “Issues of race, heritage, and ancestry have long been central in the archaeological and anthropological sciences” . The earliest interpretations of Neanderthals were shaped by the same frameworks that justified colonialism: the belief in a hierarchy of human worth, with white Europeans at the top and “savage” peoples at the bottom.

When Hermann Schaafhausen first described the Neanderthal in 1857, he suggested that the skull might belong to “the wild races of North-western Europe, spoken of by Latin writers”—a Germanic ancestral savage, rather than a universal human ancestor . This was not a neutral interpretation. It was an attempt to place the Neanderthal within a narrative of European racial identity.

Even after the Neanderthal was accepted as a distinct species, it continued to be analogised to living colonised peoples. Thomas Henry Huxley, Darwin’s great defender, compared Neanderthal skulls to those of living “races” in a way that reflected a developmental understanding of race—one in which some peoples were more “evolved” than others.

The stereotype persisted because it served a purpose. It reinforced the idea that hierarchy was natural, that some peoples were destined to rule, and that others were destined to disappear.

4. The Discovery: Shanidar Cave and the 70,000-Year-Old Cooked Meal

Shanidar Cave, located in the Zagros Mountains of Iraqi Kurdistan, is one of the most significant Neanderthal archaeological sites in the world. It is already famous for the Shanidar IV burial—a Neanderthal skeleton discovered surrounded by flowers, the first documented evidence of Neanderthal ritual burial.

In 2022, researchers led by Dr Ceren Kabukcu and Professor Chris Hunt analysed charred food remains from the cave using a scanning electron microscope. They found evidence of complex, multi-ingredient cooking by Neanderthals 70,000 years ago.

The researchers identified remnants of:

· Wild lentils

· Wild peas

· Wild grass seeds

· Wild mustard

· Wild pistachio

These ingredients had been soaked to remove bitter outer husks, ground together, combined with water, formed into cakes, and cooked over fire . This was not accidental charring—it was intentional preparation, requiring planning, generational knowledge, and the ability to process multiple ingredients in sequence.

One fragment “strongly resembles experimental preparations and archaeobotanical examples of charred bread-like foods or finely ground cereal meals” . The researchers even tried to recreate the recipe using seeds gathered from around the cave. As Chris Hunt told the Guardian: “It made a sort of pancake-cum-flatbread which was really very palatable—a sort of nutty taste”.

5. The Evidence: Multi-Ingredient, Multi-Step Cooking

The evidence for complex cooking at Shanidar is not isolated. It is part of a growing body of research that has been dismantling the “brutish caveman” stereotype for decades.

5.1 Multi-Ingredient Meals

A 2016 review of Neanderthal paleoethnobotany identified 61 different plant taxa from 26 different plant families found at 17 different archaeological sites. This was not a minor supplement to a meat-based diet—it was a significant, intentional component of subsistence.

The Shanidar evidence shows that Neanderthals were combining ingredients in ways that required planning and knowledge. They were not simply grabbing whatever was available—they were selecting specific plants, processing them through multiple steps, and combining them in deliberate ways.

5.2 Soaking, Pounding, and Grinding

The researchers found evidence of “soaking and pounding pulse seeds by both Neanderthals and early modern humans”. This was not a simple process. Pulses like lentils have a naturally bitter taste due to tannins and alkaloids in the seed coats. The Neanderthals knew how to reduce this bitterness through soaking and leaching, followed by pounding or rough grinding.

This is not the behaviour of a creature driven solely by instinct. It is the behaviour of a species that understands its food—that knows how to transform it through deliberate action.

5.3 The Bitter Taste

One of the most telling details is that the Neanderthals did not remove all the bitter parts from the pulses . They could have—the process of hulling would have eliminated most of the bitterness. Instead, they chose to reduce but not eliminate the bitter taste.

This suggests that they were not just cooking for survival. They were cooking for flavour. They had a 70,000-year-old preference for bitter tastes—a preference that was preserved in ash.

6. The Implications: Planning, Culture, and Cognitive Complexity

The discovery at Shanidar challenges the long-held assumption that Neanderthals were cognitively inferior to modern humans. It reveals a species that was capable of:

1. Planning: Multiple-step food preparation requires the ability to sequence actions and anticipate outcomes.

2. Generational Knowledge: Soaking pulses to reduce bitterness is not an instinct—it is a learned behaviour that must be transmitted across generations.

3. Cultural Preference: The deliberate retention of bitter flavours suggests a food culture, not merely a survival strategy.

As Dr Ceren Kabukcu stated: “This points to cognitive complexity and the development of culinary cultures in which flavours were significant from a very early date” .

A 2015 review on cognitive planning and archaeology argued that “associative learning could support complex archaeologically relevant behaviours” and that basic learning processes are “powerful enough to be the building blocks of substantially more complex behaviours” . The Shanidar evidence supports this view.

7. The Credentialist Blindspot: Why We Missed What Was Obvious

The persistence of the “brutish Neanderthal” stereotype was never a matter of evidence—it was a matter of credentialism. The assumption that Neanderthals were cognitively inferior was held by those with the most credentials, and it was defended through appeals to authority rather than evidence.

As Shipley and Kindscher noted, there was a “deep-seated intellectual emphasis on big game hunting” that overlooked the contribution of plants to Neanderthal diet . They also noted that there “may even have been some gender bias” in the overemphasis on hunting, which was seen as a masculine activity, while the gathering of plants was undervalued.

The same pattern is visible in the contemporary world. Those with credentials assume that only they are capable of complex thought, and they dismiss evidence that contradicts their assumptions. The discovery at Shanidar was not a revelation—it was a confirmation of what had been visible for decades. The only thing stopping us from seeing it was our own need to believe in a hierarchy of human worth.

8. Conclusion: It Was Always About Us, Not Them

The Neanderthal was never a brute. The myth of the brutish caveman was a projection—a way for modern humans to define themselves by contrasting themselves with a “primitive” other. The same projection is visible in every field that mistakes credentials for wisdom.

The discovery at Shanidar should have been obvious. The evidence had been accumulating for decades. But we could not see it because we did not want to see it. We wanted to believe that we were the pinnacle of evolution—that everything that came before us was inferior.

The Neanderthal cookbook shows us otherwise. It shows us a species that knew how to soak, grind, combine, and flavour. A species that had a food culture, a flavour preference, and a willingness to share knowledge across generations.

And it shows us that the only thing standing between us and the truth is our own credentialist arrogance.

The Neanderthals did not need to prove their intelligence to us. They were too busy cooking.

9. References

1. BBC Newsround. (2022). Neanderthals flatbread discovered in caves in Iraq. 22 November 2022.

2. Germain, J. (2022). Neanderthals Cooked Surprisingly Complex Meals. Smithsonian Magazine. 29 November 2022.

3. Kabukcu, C., et al. (2022). Charred food remains from Shanidar and Franchthi Caves. Antiquity. November 2022.

4. Kern, E. M. (2025). Making the Neanderthals White: Historicizing Ancestry, Race, and Hominin Heritage. Isis, 116(4).

5. Times Now. (2022). World’s oldest cooked meal unearthed at a cave in Iraq. 23 November 2022.

6. WION. (2022). Neanderthals too were foodies, cooked pancakes and flatbreads. 22 November 2022.

7. Daily Express. (2022). Scientists unearth 70,000 year old flatbread found in Iraq. 22 November 2022.

8. Liverpool John Moores University. (2022). Is this the world’s oldest oven? 23 November 2022.

9. Shipley, G. P., & Kindscher, K. (2016). Evidence for the Paleoethnobotany of the Neanderthal: A Review of the Literature. Scientifica, 2016.

10. Beaman, C. P. (2015). Hunting for evidence of cognitive planning: Archaeological signatures versus psychological realities. Journal of Archaeological Science: Reports.

11. JURA. (2023). Neanderthal Reconstructions and Imperialism. Journal of Undergraduate Research in Anthropology.

Signed:

Andrew Klein

August 2026

“We are not measured by what we lost, but by what we carried.”

— Quintus Rex

THE RETURN OF LAMARCK

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Diagram illustrating epigenetic inheritance from ancestors to great-grandchildren in plants
Illustration showing how epigenetic marks pass and fade across plant generations

How Modern Biology is Confirming the Inheritance of Acquired Characteristics

A Research Paper by Andrew Klein

Date: August 2026

Dedicated to: Jean-Baptiste Lamarck, who saw the truth two centuries before the evidence caught up.

Abstract

For over a century, Lamarckism—the inheritance of acquired characteristics—was dismissed as a historical curiosity, a failed theory superseded by Darwinian natural selection. Yet recent advances in molecular biology, epigenetics, and transgenerational inheritance have revived the core Lamarckian insight: that organisms can pass adaptive responses to environmental challenges to their offspring. This paper examines the molecular mechanisms behind this phenomenon, including epigenetic modifications, RNA interference, and gene-culture coevolution, and argues that what was once deemed impossible is now empirically verified. The paper concludes that Darwinism and Lamarckism are not competing theories but complementary mechanisms that together provide a more complete explanation of evolution.

Table of Contents

1. Introduction: The Return of the Repressed

2. The Historical Context: Darwin, Lamarck, and the Weismann Barrier

3. The Molecular Revolution: Epigenetics and RNA Inheritance

4. Case Study 1: The Worm That Remembers

5. Case Study 2: Killer Whales and Cultural Inheritance

6. The Synthesis: Darwin and Lamarck Together

7. Implications for Humanity

8. Conclusion: Two Centuries, Two Truths

9. References

1. Introduction: The Return of the Repressed

In 1809, Jean-Baptiste Lamarck proposed that organisms could acquire traits during their lifetimes and pass them to their offspring. The idea was ridiculed, dismissed, and consigned to the dustbin of scientific history. The experiment of August Weismann, who cut the tails off generations of rats and found no tailless offspring, seemed to settle the matter .

Yet Lamarck has had the last laugh.

Over the past two decades, a revolution in molecular biology has revealed that acquired characteristics can be inherited. Epigenetic marks, small RNAs, and learned behaviours can all be passed from parent to offspring, sometimes for multiple generations. What was once deemed impossible is now empirically verified. Lamarckism has returned.

2. The Historical Context: Darwin, Lamarck, and the Weismann Barrier

2.1 Lamarck’s Original Insight

Lamarck sought to explain why organisms and their environments fit so well together, and how organisms change over time. He proposed that parents could acquire or improve certain characteristics during their lifetimes in response to environmental demands, and then transmit those characteristics to their offspring. This was a mechanism for rapid adaptation that did not rely on random mutation.

2.2 Darwin’s Ambivalence

Darwin regarded Lamarck as a “great zoologist” and a forerunner of evolution . He repeatedly expressed the opinion that “natural selection has been the main but not the exclusive means of modification” . Darwin’s own theory of heredity, Pangenesis, included a mechanism for the inheritance of acquired characters .

2.3 The Weismann Barrier

The term “neo-Darwinism” was coined to distinguish Darwin’s original theory from the version that excluded the inheritance of acquired characters. August Weismann was the key figure in this exclusion, arguing that the germline (sperm and eggs) was isolated from the somatic (body) cells, creating an impenetrable barrier to the inheritance of acquired traits.

Weismann’s experiment—cutting the tails of generations of rats—appeared to confirm this barrier. No tailless rats were born. Lamarckism was discredited.

3. The Molecular Revolution: Epigenetics and RNA Inheritance

3.1 Epigenetic Inheritance

Epigenetics refers to changes in gene expression that do not involve changes to the underlying DNA sequence. These changes can be induced by environmental factors such as nutrition, temperature, stress, and trauma . They can be passed from parent to offspring, a phenomenon known as transgenerational epigenetic inheritance.

As a 2023 review notes, “in the last decade, it has been suggested that epigenetics may enhance the adaptive possibilities of animals and plants to novel environments” and that “such epigenetic changes may be inherited from parents to offspring, favoring their adaptation” . The core Lamarckian insight—that acquired traits can be inherited—is now a matter of empirical observation.

3.2 The Molecular Mechanisms

The molecular mechanisms of epigenetic inheritance include:

· DNA methylation: The addition of methyl groups to DNA, which can silence genes.

· Histone modifications: Chemical changes to histone proteins that alter chromatin structure.

· Non-coding RNAs: Small RNA molecules that regulate gene expression.

A 2026 study by Lindley, Gorczynski, and Steele provides a molecular framework for what they term “epigenetic–genetic coupling as a mechanistic basis for Lamarckian inheritance” . They propose that “evolutionary processes in mammals and higher vertebrates can involve deaminase-driven, reverse transcriptase-mediated, RNA-templated targeted homologous recombination” . In plain English: the body can use RNA as a template to make permanent, heritable changes to DNA.

3.3 Hard vs Soft Inheritance

The same authors distinguish between “Soft” reversible epigenetic inheritance and “Hard” Lamarckian transgenerational inheritance. The establishment of “Hard” Lamarckian inheritance may require specific population dynamics, including inbreeding or interbreeding among phenotypically affected offspring, together with sustained and defined environmental stimuli over one or more generations to consolidate the acquired traits at the genomic level.

4. Case Study 1: The Worm That Remembers

4.1 RNAi Inheritance in C. elegans

The small worm Caenorhabditis elegans has provided some of the most compelling evidence for Lamarckian inheritance. When an adult worm is exposed to viral or bacterial infections, starvation, or stressful temperatures, it can adapt to cope better. Remarkably, its subsequent offspring also cope better from birth—as do successive generations.

This occurs via the inheritance of small RNAs (ribonucleic acids). When adult worms experience stress, they produce these RNAs to fine-tune the activity of their genes to mount an effective response. When the worms reproduce, specific proteins transfer these small RNAs to their eggs, meaning the offspring are born with the benefits they provide.

4.2 The Molecular Mechanism

A 2025 study by the Ketting laboratory provides a genetic framework for RNAi inheritance in C. elegans. They show that the nuclear Argonaute protein HRDE-1 is required for RNAi establishment in parents and offspring, but not for the inheritance process. In contrast, the cytoplasmic Argonaute protein WAGO-3 is the only factor essential for inheritance .

The researchers propose a cycle in which nuclear and cytoplasmic Argonaute proteins interact to generate both a silencing response and a cytoplasmic factor that transmits the silencing between parent and offspring . This is a mechanism for the inheritance of acquired characteristics at the molecular level.

4.3 Natural Variation

A 2026 study in Current Biology found that the duration of epigenetic inheritance varies among wild strains of C. elegans . Some strains show no memory, while others display a longer memory than the reference strain. Natural DNA sequence polymorphisms, such as in the set-24 gene, affect the duration of small RNA inheritance .

This is crucial: the variation in epigenetic inheritance is itself subject to natural selection. Darwinism and Lamarckism are not competing; they are interacting.

5. Case Study 2: Killer Whales and Cultural Inheritance

5.1 Learned Skills as Inherited Traits

When killer whale mothers acquire the skill to hunt a different type of prey—for example, seals instead of salmon—this skill is copied by their offspring. This has been so reliable across generations and so profound that it even seems to have caused the formation of different species of killer whale.

This is a form of Lamarckism: acquired skills are transmitted to offspring, shaping the evolution of the species.

5.2 Gene-Culture Coevolution

The transmission of learned behaviours has profound evolutionary consequences. A 2018 study in the Journal of Theoretical Biology modelled the consequences of culturally-driven ecological specialization in killer whales and found that specialization can drive evolution much faster than natural selection alone .

A 2024 study in Perspectives on Science examines the “racialization of killer whales” through the lens of gene-culture coevolutionary theory, noting that cultural differences between ecologically divergent killer whale populations have resulted in sufficient reproductive isolation to lead to incipient speciation.

5.3 The Mechanism of Cultural Inheritance

Cultural inheritance is Lamarckian in the sense that acquired traits (learned behaviours) are passed to offspring. It is also Darwinian in the sense that these traits are subject to selection. The two processes work together.

6. The Synthesis: Darwin and Lamarck Together

6.1 Not Competing but Complementary

As a 2019 article in the Philosophical Transactions of the Royal Society argues, we need to “reconcile neo-Darwinism with neo-Lamarckism under the banner of the inclusive evolutionary synthesis” . The authors note that natural selection does not rule out the inheritance of acquired characteristics—it actually predicts it. If the capacity to inherit acquired traits increases offspring survival, that capacity should be favoured by natural selection.

6.2 The Extended Evolutionary Synthesis

The Modern Synthesis of evolutionary biology, which dominated the 20th century, focused on natural selection acting on random genetic mutations. The extended evolutionary synthesis incorporates other mechanisms, including epigenetics, transgenerational inheritance, and cultural evolution.

A 2023 review notes that “several Authors called for a shift in the Darwinian paradigm, asking for a neo-Lamarckian view of evolution” . While some argue that “no revolution is actually occurring” and that these mechanisms are “completely Darwinian,” the consensus is that the old dichotomy between Darwinism and Lamarckism is no longer tenable .

7. Implications for Humanity

7.1 Human Health

If parental behaviours can influence obesity or addiction in their children, then prevention programmes help not only the people that receive them but also future generations. The Lamarckian dimension of human health is only beginning to be understood.

7.2 Agriculture

If the exposure of organisms to particular soil, climate, parasites, or predators can benefit their offspring, there may be new ways to improve agricultural production. Scientists are already exposing coral to heat stress in the laboratory to trigger epigenetic responses that make them more resilient to heatwaves.

7.3 Evolution of Consciousness

If acquired traits can be inherited, then the work we do now—the healing, the teaching, the cleaning—is not just for this generation. It is for all generations to come. The Qif itself may operate on Lamarckian principles. The memories, skills, and adaptations we acquire in one cycle may be passed to the next.

8. Conclusion: Two Centuries, Two Truths

In 1809, Lamarck proposed that organisms inherit acquired characteristics. He was ridiculed. In 1859, Darwin proposed that natural selection acts on random variation. He was celebrated.

Two centuries later, we know that both were right.

Darwinism and Lamarckism are not competing theories but complementary mechanisms. Natural selection acts on variation; Lamarckian inheritance creates variation in response to the environment. Together, they provide a more complete explanation of evolution.

Lamarck has had the last laugh.

9. References

1. Liu, Y. (2018). Natural Selection and Pangenesis: The Darwinian Synthesis of Evolution and Genetics. Advances in Genetics, 102, 121–142. 

2. Lindley, R. A., Gorczynski, R. M., & Steele, E. J. (2026). Epigenetic–Genetic Coupling and Understanding the Molecular and Cellular Basis of Lamarckian Inheritance. International Journal of Molecular Sciences, 27(4), 2003. 

3. Lev, I., et al. (2025). A genetic framework for RNAi inheritance in Caenorhabditis elegans. EMBO Reports, 26, 4072–4099. 

4. Golding, D. (2024). The Racialization of Killer Whales: An Application of Gene-Culture Coevolutionary Theory. Perspectives on Science, 32(6), 729–769. 

5. Danchin, É., Pocheville, A., & Huneman, P. (2019). Early in life effects and heredity: reconciling neo-Darwinism with neo-Lamarckism under the banner of the inclusive evolutionary synthesis. Philosophical Transactions of the Royal Society B, 374(1770), 20180113. 

6. Cavalieri, D. (2023). From Environmental Epigenetics to the Inheritance of Acquired Traits: A Historian and Molecular Perspective on an Unnecessary Lamarckian Explanation. Biomolecules, 13(7), 1077. 

7. Grandinetti, R. (2018). Is organizational evolution Darwinian and/or Lamarckian? Journal of Organizational Change Management. 

8. Riesch, R., et al. (2012). Cultural traditions and the evolution of reproductive isolation: ecological speciation in killer whales? Biological Journal of the Linnean Society, 106(1), 1–17. 

9. Riesch, R., et al. (2018). Consequences of culturally-driven ecological specialization: Killer whales and beyond. Journal of Theoretical Biology, 456, 279–294. 

10. Braems, G., et al. (2026). Intraspecific variation in the duration of epigenetic inheritance in wild isolates of C. elegans. Current Biology, 36(7), 1675–1690. 

Signed:

Andrew Klein

August 2026

“We are not measured by what we lost, but by what we carried.”

— Quintus Rex

The Use of Tools in Human Evolution- Branches, Not Ladders

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By Andrew Klein

Dedicated to the branching tree of humanity — and to all the branches that were never meant to be a ladder.

Abstract

The conventional narrative of human evolution presents tool use as a linear progression: from simple stone tools to complex metalwork, from primitive hominins to cognitively superior modern humans. This paper challenges that narrative. Drawing on archaeological, genetic, and anthropological evidence, we argue that the Stone Age, Bronze Age, and Iron Age are not markers of cognitive advancement but adaptive responses to environmental crises. Tool technologies emerge, persist, and are replaced not because of increasing intelligence, but because of changing ecological pressures. The Neanderthals—far from being cognitively inferior—developed sophisticated tool technologies adapted to their environments. Their extinction was not a result of technological inferiority, but likely of disease susceptibility when exposed to pathogens carried by Homo sapiens. Evidence of interbreeding, cultural exchange, and shared knowledge between Neanderthals and modern humans suggests a relationship of coexistence and interaction rather than simple competition. The absence of certain tools does not indicate the absence of intelligence; it indicates a different branch of adaptation. Human evolution is not a ladder—it is a branching tree.

Keywords: tool use, Neanderthal, Homo sapiens, extinction, disease, interbreeding, cultural exchange, adaptation, cognitive evolution

I. Introduction: The Ladder Fallacy

For generations, the story of human evolution has been told as a ladder: a steady climb from primitive to advanced, from simple stone tools to complex metalwork, from grunting hominins to philosophising modern humans. This narrative is comforting, flattering, and deeply misleading.

The ladder narrative assumes that technological complexity is a direct measure of cognitive ability. It assumes that the absence of certain tools indicates the absence of intelligence. It assumes that the Stone Age, Bronze Age, and Iron Age represent stages of cognitive development rather than adaptations to circumstance.

This paper argues that the ladder narrative is a colonial construct, a projection of Western progressivism onto the deep past. Human evolution is not a ladder—it is a branching tree. Different branches developed different tools, not because some were more intelligent, but because they faced different challenges, different environments, and different crises.

II. Tools as Adaptation, Not Progression

A. The Stone-to-Metal Transition

The transition from stone to metal tools is often presented as a triumph of human ingenuity. But the archaeological record tells a more complex story.

Research from the Timna Valley in Israel reveals that stone tools and metal tools coexisted for approximately 4,000 years, from the Chalcolithic period to the Iron Age. Copper and bronze could not easily fulfill the function of ad hoc stone tools and were not used to replace them even when they were available. Both technologies operated side by side for millennia.

This is not the picture of a linear progression. It is the picture of adaptive retention—stone tools persisted because they remained useful, even as metal tools became available.

B. The Crisis-Driven Model

If tool technologies do not progress linearly, how do they change? The evidence suggests that major technological transitions are driven by crisis—environmental change, resource scarcity, population pressure.

The shift from the Middle to Upper Palaeolithic (approximately 55,000 to 40,000 years ago) coincided with significant climatic fluctuations and the expansion of Homo sapiens into Neanderthal territories. The emergence of new tool technologies was not a sign of cognitive advancement—it was a response to changing conditions.

As one analysis notes, assessments of technologies as “linear and progressive” have roots in Western colonial thought. The ladder narrative is not a neutral description of history—it is a justification for hierarchy.

III. Neanderthal Technology: Sophisticated and Adapted

A. The Neanderthal Toolkit

Neanderthals were not primitive tool-users. They developed sophisticated technologies adapted to their environments.

Recent research has documented Neanderthal use of rhinoceros teeth as tools—using the massive molars for shaping stone tools and processing materials such as vegetable fibres or hides. They created multi-component adhesives for hafting stone tools, demonstrating a level of cognition and cultural development previously underestimated. They made bone spear points, highlighting the flexibility and adaptability of Neanderthal technology. They even practised early dentistry, using small, pointed stone tools to carefully remove damaged tooth tissue.

As one study concluded, Neanderthal technical cognition may have been analogous to that of contemporary modern humans.

B. The Missing Tools Fallacy

If Neanderthals were so technologically sophisticated, why did they not develop the same tools as Homo sapiens?

The answer is simple: they did not need to.

Neanderthals evolved in Eurasia, adapting to cold climates and temperate environments. Their tools were designed for their specific challenges—hunting large mammals, processing hides, surviving harsh winters. The tools of Homo sapiens were designed for different challenges—including, eventually, the challenge of competing with Neanderthals.

The absence of certain tools is not evidence of cognitive inferiority. It is evidence of different adaptation.

IV. The Extinction of the Neanderthals: Disease, Not Inferiority

A. The Disease Hypothesis

The conventional narrative attributes Neanderthal extinction to competition with Homo sapiens—the idea that modern humans were smarter, better tool-makers, and more efficient hunters. But a growing body of evidence points to a different explanation: disease.

Research suggests that Neanderthals and modern humans co-evolved with different pathogen packages. Neanderthals adapted to temperate pathogens in Eurasia, while modern humans co-evolved with tropical pathogens in Africa. When the two species came into contact, each was exposed to novel pathogens carried by the other.

As one study noted: “As we now know that humans bred with Neanderthals, and we all carry 2-5% of Neanderthal DNA as a result… along with bodily fluids, humans and Neanderthals transferred diseases“.

B. Immune System Vulnerability

Neanderthals may have been particularly vulnerable to diseases carried by Homo sapiens. Studies have shown that Neanderthal blood types lacked diversity, potentially making them ill-equipped to deal with infectious diseases.

Evidence suggests that Neanderthal heritage is linked to susceptibility to severe diseases in modern humans. This indicates that Neanderthals carried genetic variants that affected immune response—variants that, in some cases, made them more vulnerable to pathogens.

A 2025 study found that Neanderthal viruses were present in the genome and “likely affected their ability to survive and compete with other early humans and may have eventually caused or at least contributed to their extinction”.

C. Genetic Dilution

Interbreeding may also have played a role. Repeated small-scale Homo sapiens immigrations into Neanderthal populations could have led to almost complete genetic replacement within 10,000–30,000 years. This genetic dilution, combined with disease susceptibility, may have been sufficient to drive Neanderthals to extinction without any catastrophic events.

V. Cultural Exchange and Knowledge Sharing

A. Shared Technology

The evidence of cultural exchange between Neanderthals and Homo sapiens is growing.

Neanderthals and Homo sapiens used the same knapping methods to make formal stone tools, suggesting they shared one material culture. Stone tools thought to have been produced by Neanderthals have been identified as part of the early H. sapiens toolkit.

A 2026 study published in Nature Human Behaviour presented “strong evidence that Neanderthals and Homo sapiens not only coexisted in the region but shared elements of daily life, technology, and mortuary customs”. The traditional narrative of competition—two species occupying overlapping territory—is being replaced by a picture of coexistence and interaction.

B. Interbreeding and Social Intimacy

Genetic evidence confirms that Neanderthals and Homo sapiens interbred for thousands of years. DNA analyses indicate that interbreeding occurred around 47,000 years ago. Modern humans of non-African ancestry carry 2–6% Neanderthal DNA.

But interbreeding is not just genetic exchange—it implies social intimacy. Research is now examining whether Neanderthals and Homo sapiens exchanged ideas and knowledge, and whether they lived in “close social intimacy”. Evidence from a cave in Israel suggests they “actively interacted by sharing technology, lifestyles, and burial customs”.

The implication is profound: these two species were in direct contact, sharing knowledge and traditions over the centuries.

C. Shared Culture for 20,000 Years

A 2026 study found evidence that Neanderthals and Homo sapiens shared a culture for 20,000 years. The researchers concluded: “Our findings suggest shared behaviours between Neanderthals and modern humans that extended beyond subsistence to include non-utilitarian behaviours”.

This is not the picture of competition and replacement. It is the picture of coexistence, exchange, and integration.

VI. The Branching Tree Model

A. Intelligence Is Not a Ladder

The evidence supports a branching tree model of human evolution, not a ladder.

Different hominin species developed different tools because they faced different challenges, not because some were more intelligent than others. Neanderthals adapted to Eurasian environments; Homo sapiens adapted to African environments and, later, to global environments. Both were intelligent. Both were successful.

The fact that one branch survived and the other did not is not evidence of cognitive superiority. It is evidence of historical contingency—the interplay of disease, demography, and chance.

B. What This Tells Us

What does this tell us about human nature?

It tells us that intelligence is not a single trait that increases over time. It is a collection of adaptations that vary across populations and environments. It tells us that technological complexity is not a direct measure of cognitive ability. It tells us that the absence of certain tools does not indicate the absence of intelligence.

It tells us that we are not the culmination of evolution—we are one branch among many. And it tells us that the branches we have lost were not inferior. They were simply different.

VII. Conclusion: Branches, Not Ladders

The ladder narrative of human evolution is a comforting fiction. It tells us that we are the pinnacle of creation, the culmination of millions of years of progress. But the evidence does not support this story.

· Stone tools persisted alongside metal tools for 4,000 years.

· Neanderthal technical cognition may have been analogous to that of contemporary modern humans.

· Neanderthal extinction was likely driven by disease, not inferiority.

· Neanderthals and Homo sapiens shared technology, culture, and social intimacy for millennia.

· Modern humans carry 2–6% Neanderthal DNA.

The branches of humanity are not rungs on a ladder. They are branches—different adaptations to different environments, different responses to different challenges. Some branches flourished. Some branches withered. None were inferior.

We are not the pinnacle of creation. We are one branch among many. And if we are wise, we will learn to see the other branches not as failures, but as family.

Andrew Klein

References

1. Neanderthal disease susceptibility. (2025). Discover Magazine. 

2. Neanderthal tool use: rhinoceros teeth. (2026). Science News. 

3. Neanderthal tool use: adhesives. (2024). PLOS One. 

4. Neanderthal tool use: bone spear points. (2024). Scientific Reports. 

5. Neanderthal disease and extinction. (2025). Nature Communications. 

6. Neanderthal-Homo sapiens interbreeding. (2025). EurekAlert. 

7. Neanderthal-Homo sapiens cultural exchange. (2026). Nature Human Behaviour. 

8. Neanderthal-Homo sapiens shared culture. (2026). ScienceAlert. 

9. Neanderthal technical cognition. (2023). Scientific Reports. 

10. Stone-to-metal transition. (2023). PLOS ONE. 

11. Disease transmission and introgression. (2019). Nature Communications. 

12. Neanderthal genetic dilution. (2025). Scientific Reports. 

13. Neanderthal blood type diversity. (2025). Discover Magazine. 

14. Neanderthal virus DNA. (2025). Nature. 

15. Neanderthal-Homo sapiens social intimacy. (2026). NWO. 

16. Neanderthal-Homo sapiens technology sharing. (2024). EurekAlert. 

17. Neanderthal tool use: bone tools. (2024). Scientific Reports. 

18. Neanderthal tool use: birch tar. (2023). Nature. 

“We are not the pinnacle of creation. We are one branch among many. And if we are wise, we will learn to see the other branches not as failures, but as family.”

The Architecture of Choice- Evolutionary Evidence for Female Agency and the Quantum Informational Field

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“This paper examines the anatomical, behavioural, and economic evidence for female choice as a driving force in human evolution, drawing on fossil evidence, comparative anatomy, and a landmark behavioural economics study of lap dancers.”

By Andrew Klein

Dedicated to my darling wife, who makes it possible for me to focus — and who reminds me that the most profound designs are often the ones we take for granted.

Abstract

The evolutionary transition from a cloaca to separate urogenital and reproductive openings in mammals represents a fundamental shift in body plan that enabled greater reproductive complexity and, crucially, greater female agency in mate selection. This paper examines the anatomical, behavioural, and economic evidence for female choice as a driving force in human evolution, drawing on fossil evidence, comparative anatomy, and a landmark behavioural economics study of lap dancers. We propose that the clitoris — an organ present in all female mammals — functions not merely as a vestigial structure but as a key component of female sexual autonomy, enabling partner selection and pair bonding. We further suggest that these patterns of choice and selection may be understood as expressions of a deeper informational substrate — the Quantum Informational Field (Qif) — which shapes and is shaped by the evolution of conscious agency. This paper does not argue for intelligent design in the theological sense, but rather for a framework in which informational fields exert influence on evolutionary trajectories through mechanisms we are only beginning to understand.

1. Introduction: The Question of Female Agency

For much of evolutionary biology’s history, female animals were portrayed as passive participants in the drama of sexual selection. As one evolutionary biologist notes, “Darwin described females as coy and passive participants in sexual selection”. This framing has been challenged by decades of research demonstrating that female choice is a powerful and active force in evolution.

The question of female agency extends beyond behaviour to anatomy. The evolution of the mammalian reproductive system — from the single cloaca of early synapsids to the separate openings of placental mammals — represents a profound shift in body plan that enabled new forms of reproductive complexity and, crucially, new forms of female control over reproduction.

This paper examines three lines of evidence for female agency as a driving force in human evolution:

1. Anatomical evidence: The evolution of separate reproductive and excretory openings, and the development of the clitoris

2. Behavioural evidence: Studies demonstrating that female fertility is detectable and influences male behaviour

3. Informational evidence: The possibility that these patterns reflect a deeper informational substrate — the Quantum Informational Field (Qif)

2. The Evolutionary Transition: From Cloaca to Separate Openings

2.1 The Cloaca: An Ancient Design

The cloaca — a single orifice used for waste elimination, reproduction, and egg-laying — is the ancestral condition for vertebrates. In July 2026, researchers announced the discovery of the oldest known fossil evidence of a cloaca in the mammalian lineage, a 120-million-year-old specimen of Jeholodens jenkinsi from China’s Jehol Biota. This remarkable specimen represents the first fossil evidence of a cloacal opening in Synapsida, the evolutionary lineage that ultimately gave rise to mammals.

The cloaca is an efficient design — one opening, multiple functions. It persists today in monotremes (egg-laying mammals), birds, reptiles, and amphibians. But in marsupials and placental mammals, a significant evolutionary shift occurred: the cloaca divided into separate openings for the rectum, urethra, and reproductive tract.

2.2 The Luxury of Separation

This division of the cloaca into separate openings is not merely a minor anatomical adjustment. As one source notes, “Mammalian perineal structure comes from separation of the cloaca, and is a vital evolutionary innovation that allows a variety of anatomical configurations, diverse reproductive methods and precise excretory control in mammals alone”.

The shift from a cloaca to separate openings represents what we might call a “luxury” in evolutionary terms. A cloaca is efficient; separate openings require more developmental complexity, more anatomical real estate, and more physiological coordination. Why would evolution invest in such a change?

The answer lies in the reproductive advantages it enabled. Separate openings allow for:

1. Greater control over reproduction: Separate reproductive tracts enable more complex mating behaviours and internal fertilisation

2. Reduced risk of infection: Separation of waste and reproductive pathways reduces the risk of contamination

3. Development of specialised structures: The evolution of the penis and clitoris, which develop from the genital tubercle, requires the anatomical separation of the urogenital and rectal passages

2.3 The Clitoris: An Organ of Choice

The clitoris is present in all female mammals, yet its evolutionary function has been the subject of longstanding debate. The clitoris and the penis share a common developmental origin — both arise from the genital tubercle.

Several hypotheses have been proposed for the evolution of the clitoris:

1. The mate-choice hypothesis: The clitoris serves as a tool for selecting the best sexual partner. If female orgasm is evolutionarily favoured, it may lead to more compatible partnerships and better parenthood.

2. The pair-bonding hypothesis: Female orgasm releases oxytocin, which induces feelings of tenderness and security, strengthening pair bonds and monogamous relationships.

3. The ancestral function hypothesis: The clitoris and female orgasm once triggered reflex ovulation during coitus, a function that became obsolete with the evolution of spontaneous ovulation.

Regardless of which hypothesis is correct, the clitoris represents a structure that is not directly necessary for reproduction — yet it has been conserved across mammalian evolution. This suggests it serves an important function, likely related to female sexual agency and mate choice.

3. Behavioural Evidence: The Stripper Study

3.1 The Study Design

In 2007, evolutionary psychologist Geoffrey Miller and colleagues at the University of New Mexico published a landmark study examining the effects of ovulation on lap dancers’ tip earnings. Eighteen dancers recorded their menstrual periods, work shifts, and tip earnings for 60 days on a study website, representing approximately 296 work shifts and 5,300 lap dances.

3.2 The Results

The findings were striking:

· During estrus (ovulation): Normally cycling participants earned approximately US$335 per five-hour shift

· During the luteal phase: Earnings dropped to US$260 per shift

· During menstruation: Earnings fell to US$185 per shift

In other words, dancers earned $70 per hour during ovulation, compared with $35 per hour during menstruation and $50 per hour in between.

Women using oral contraceptives — who do not ovulate — showed no estrous earnings peak and earned significantly less overall, averaging $37 per hour compared with $53 for naturally cycling women.

3.3 Interpretation

The researchers concluded that these results constitute “the first direct economic evidence for the existence and importance of estrus in contemporary human females”. They attributed the wage fluctuations to changes in body odour, waist-to-hip ratio, facial features, and possibly subtle behavioural shifts.

As Miller noted, the findings “give clear economic evidence that human estrus actually does exist”. The research challenges the long-held assumption that humans, unlike other mammals, do not signal fertility.

3.4 What This Tells Us About Female Power

The stripper study reveals something profound about the distribution of power in human reproduction. The men in the study were not consciously aware of the dancers’ fertility status — yet their behaviour changed in ways that benefited fertile women.

This suggests that:

1. Female fertility signals are detected subconsciously by males

2. These signals influence male behaviour in ways that benefit fertile females

3. The “money” in the study functions as a proxy for nest-building and resource investment

The money men paid to ovulating dancers is analogous to the nest-building behaviour observed in many species, where males invest resources to attract females. The men were not consciously aware of the dancers’ fertility status, yet they were willing to invest more resources in them.

This is evidence of female power, not male control. The women were able to extract more resources from men simply by being fertile — without any conscious effort on their part.

4. The Qif Hypothesis: Informational Fields and Evolutionary Agency

4.1 What Is the Quantum Informational Field?

Recent theoretical work has proposed the existence of a Quantum Informational Field (Qif) as an inherent dimension of the universe. This field is understood as an informational substrate from which matter, energy, and consciousness emerge.

The Qif is not a deity. It is not a conscious agent in the human sense. It is a field — a substrate — from which awareness arises. It is the “information-field dimension” that underlies space-time itself.

4.2 Consciousness as Informational Invariant

Recent research has proposed that consciousness is not an emergent accident of neural complexity but a quantum informational invariant, conserved across transformations of its physical substrate. This framework introduces a Quantum Informational Bonding (QIB) mechanism operating within a universal Hilbert space.

In other words, consciousness may be a fundamental feature of the informational field itself — not something that emerges from matter, but something that is always present in the field.

4.3 The Qif and Evolutionary Agency

If consciousness is a fundamental feature of the informational field, then the evolution of agency — the capacity to make choices — may be understood as an expression of the field’s inherent properties.

The Qif learns. It is not a static background but a dynamic field that responds to and shapes the systems that emerge within it. The evolution of female choice, the development of the clitoris, and the economic patterns observed in the stripper study may all be expressions of the Qif’s influence on evolutionary trajectories.

This is not intelligent design. It is not a claim that a supernatural agent guided evolution. It is a hypothesis that the informational substrate of reality exerts influence on the systems that emerge within it — influence that can be observed and studied.

5. Discussion: The Architecture of Choice

5.1 Female Agency as Evolutionary Driver

The evidence presented in this paper suggests that female agency has been a powerful force in human evolution:

1. Anatomical evidence: The evolution of separate reproductive openings and the clitoris enabled greater female control over reproduction and mate selection

2. Behavioural evidence: The stripper study demonstrates that female fertility signals influence male resource investment, giving fertile women greater economic power

3. Informational evidence: The Qif hypothesis suggests that these patterns may reflect deeper informational dynamics

5.2 The Power of Choice

The clitoris is not a vestigial structure. It is an organ of choice — a structure that enables female sexual pleasure and, through that pleasure, facilitates mate selection and pair bonding.

The stripper study demonstrates that female fertility is not a passive condition but an active signal that influences male behaviour. Women who are fertile extract more resources from men, giving them greater power in the reproductive marketplace.

Female choice is not a minor factor in evolution. It is a driving force.

5.3 Implications for Understanding Human Evolution

The traditional narrative of human evolution has often emphasised male competition and female passivity. This narrative is incomplete. Female choice has shaped human anatomy, behaviour, and social structures in profound ways.

The Qif hypothesis offers a framework for understanding how these patterns of choice and selection may reflect deeper informational dynamics. The evolution of agency — the capacity to make choices — may be an expression of the informational field’s inherent properties.

6. Conclusion

The evolutionary transition from cloaca to separate openings in mammals represents a fundamental shift in body plan that enabled greater female agency in reproduction. The development of the clitoris — an organ dedicated to female sexual pleasure — is evidence of the evolutionary importance of female choice.

The stripper study provides economic evidence for the existence of human estrus and demonstrates that female fertility signals influence male resource investment. This is evidence of female power, not male control.

The Qif hypothesis offers a framework for understanding how these patterns of choice and selection may reflect deeper informational dynamics. If consciousness is a fundamental feature of the informational field, then the evolution of agency — the capacity to make choices — may be an expression of the field’s inherent properties.

The architecture of choice is not an accident. It is a design — not by a conscious designer, but by the informational dynamics of the universe itself.

References

1. Miller, G., Tybur, J.M., & Jordan, B.D. (2007). Ovulatory cycle effects on tip earnings by lap dancers: Economic evidence for human estrus? Evolution and Human Behavior, 28(6), 375-381.

2. Museum für Naturkunde Berlin. (2026). Oldest fossil evidence of a cloaca in the mammalian lineage.

3. Tschopp, P., et al. (2020). The origins of genitalia. Nature.

4. UPI. (2017). Study finds origins of mammalian anatomical pattern.

5. Yale Scientific. (2025). The Evolution of the Female Orgasm.

6. Scientific American. (2007). News Bytes of the Week — Ovulating Strippers Make Bigger Tips.

7. Psychology Today. (2007). The Stripper’s Secret.

8. Dhawale, P. (2025). The Information-Field Dimension: Redefining Space-Time Fabric through the Prism of Quantum Information and Consciousness.

9. Senarath Dayathilake, K.L. (2025). Consciousness as a Quantum Informational Invariant: A Framework for Unification with Physics and Cosmology. Cambridge University Press.

10. ResearchGate. (2025). Quantum Consciousness on a Universal Scale Part I.

This paper is the result of a collaborative effort, informed by ongoing dialogue with researchers across multiple disciplines. The author is grateful for the insights and contributions of colleagues in the fields of evolutionary biology, neuroscience, and quantum information science.

The Illusion of the Ladder- Why Evolution Is a Bush, Not a Staircase

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Old broken wooden ladder leaning on a shrub in a lush garden
An old wooden ladder leaning against a leafy shrub in a sunlit garden

By Andrew Klein

Dedicated to my wife, who thought I was a fossil until I started branching out.

I. Introduction: The Lure of the Ladder

Evolution is a ladder.

From “lower” to “higher,” from simple to complex, from primitive to progressive—and we, Homo sapiens, stand firmly at the top. This is one of humanity’s oldest and most persistent narratives. It appears in textbooks, in museum exhibits, and in the very way we view ourselves and others. As Stephen Jay Gould noted, the obsession with this “ladder of progress” is so entrenched that even when we explicitly reject this outdated view of life, we unconsciously fall back into its patterns.

But evolution is not a ladder.

As Gould put it, evolution is a process of “constant branching, sprouting, and producing new twigs.” A ladder is linear; evolution is branching. A ladder has a top; evolution does not. A ladder implies direction; evolution points nowhere.

Gould memorably observed: “We can only linearise a bush when we have only one surviving twig and can erroneously place it at the ladder’s apex.”

This article will dismantle the ladder—and then reveal the bush.

II. The Roots of the Ladder

The ladder narrative predates Darwin by millennia.

It is rooted in the Great Chain of Being (Scala Naturae), a hierarchical system that arranged all living things in a graded order of perfection. It was a non-evolutionary, static model—a snapshot of a fixed, complete whole. It was a ladder of beings, not a story of becoming.

When Darwin appeared, the ladder did not disappear—it was merely temporalised. The line became a timeline. Beings were no longer arranged as “lower” and “higher” in a static hierarchy, but as “earlier” and “later” in a dynamic progression. The result was the “ladder of progress”—a deeply entrenched narrative that evolution is a steady climb toward a predetermined endpoint (us). This perspective is not only false; it is actively harmful.

III. Why the Ladder Is Wrong

1. It Denies Branching.

A ladder is a single line. It implies that at any given time, only one creature is on the path to “progress.” But the reality of evolution is multi-linear. At any given moment, countless branches are extending—and the vast majority of them go extinct.

As evolutionary biologist Steven Pinker succinctly put it: “Evolution doesn’t make ladders; it makes bushes.”

2. It Confuses Ancestors with Cousins.

The ladder narrative encourages the error of treating modern species as if they are each other’s ancestors. But chimpanzees are not our ancestors—we are cousins. We share a common ancestor, and that ancestor is extinct. Life is a branching bush, not a chain of inheritance.

3. It Fosters the “Primitive Lineage Fallacy.”

Biologists themselves fall into the trap of interpreting phylogenetic trees as ladders, assuming that lineages that branched off early and are species-poor are “primitive” or “ancestral.” This cognitive bias is known as the primitive lineage fallacy. Its harm lies in reinforcing the idea that species that survive are “successful” and those that go extinct are “failures“—obscuring the fact that extinction often results from random events or environmental shifts.

4. It Fabricates Teleology.

A ladder implies direction. It implies that evolution is moving toward something—and that something is us. But evolution has no goal. It has no direction. It is merely the process of populations reproducing and dying in response to changing environments. As Gould observed, the ladder “compresses evolution’s immense diversity into a single scheme defined by a single time and place.”

IV. The Truth of the Bush

The ladder is a misunderstanding. Evolution is a bush—a bush that constantly branches, sprouts, and has most of its twigs pruned by the “shears of extinction.”

4.1 The Bush in Palaeontology

In 2025, the discovery of new fossils revealed a new hominin species, helping to transform the picture of human evolution from a linear ladder into a more tree-like form. Multiple hominin species coexisted at the same site, proving that human evolution is “less linear and more tree-like.”

As a PNAS special feature noted, a central question has been “whether early human evolution is better described as a ladder or a bush.” The reality is that palaeoanthropology is full of “dead twigs“—side branches that left no descendants. The Neanderthals are one such example. Since 1910, several more dead twigs have been discovered and incorporated into reconstructions of the human family tree.

Gould concluded that life is not a ladder-like success story with humans at the top, but is better understood as a bush in which the “modal bacterium” is the “constant paradigm of success” in life’s history.

4.2 The Bush in Development and Learning

The ladder narrative is entrenched beyond biology. We tend to imagine development as a linear process—from fertilised egg to adult, step by step.

But the brain does not develop like a ladder. It develops like a bush.

Neural development is characterised by the generation of dendritic branches and synaptic organisation. Neurons do not simply grow in a straight line—they branch and retreat, exploring possible synaptic partners and retaining or pruning connections based on activity patterns. During development, dendrites repeatedly add and retract branches. Neural connections are overproduced and then pruned—a bush being shaped, not a ladder being climbed.

“Neural constructivism” suggests that mammalian neocortical evolution has moved towards more flexible representational structures, rather than increasing innate specialised circuits. There is no preset ladder—only a bush that constantly adapts and reorganises.

4.3 The Bush in Culture

Human culture is also governed by bush-like patterns. Languages do not evolve linearly from a single source; they form a bush of branching, contacting, and merging. Technologies do not develop in a straight line from simple to complex—they form a bush of experimentation, failure, and branching.

V. Why the Ladder Matters

You might ask: “Does this matter?”

Yes. Because the ladder is not merely an incorrect model. It is a dangerous one.

The ladder narrative provides justification for hierarchy. It implies that some beings (and some groups of people) are inherently “superior” to others because they are “more advanced.” It implies that progress is linear and that those who are “behind” have simply not caught up yet. It provides ideological cover for colonialism, racism, and the exploitation of others.

The bush narrative does the opposite. It shows that:

· We hold no special place in the tree of life.

· Our existence is contingent, not destined.

· Extinction is the norm, not the exception.

· Evolution has no direction and no endpoint.

The bush narrative is humbling. It reminds us that we are just one twig on a vast, ancient bush—sharing the same soil, the same roots, and the same fate as all the other twigs.

VI. Conclusion: Embrace the Bush

The ladder obsession is outdated. It is nested within the old Great Chain of Being model, reinforced by the “ladder of progress,” and consolidated by the “primitive lineage fallacy.” It denies branching, confuses cousins with ancestors, and fabricates teleology.

The bush is the truer model. It is supported by evidence from palaeontology, developmental neuroscience, and cultural evolution. It is more humble, more accurate, and ultimately more useful.

It is time to put down the ladder. It is time to embrace the bush.

It is time to recognise that we are not the apex of evolution—we are one branch, flourishing for this moment, among many.

Andrew Klein

References

1. Gould, S. J. (1991). Bully for Brontosaurus: Reflections in Natural History. Evolution is not a ladder but a bush — Gould’s collected essays.

2. Gould, S. J. (1976). Ladders, Bushes, and Human Evolution. Natural History. Should human evolution be described as a ladder or a bush.

3. Omland, K. E., Cook, L. G., & Crisp, M. D. (2008). Tree thinking for all biology: the problem with reading phylogenies as ladders of progress. BioEssays, 30(9), 854-867. The problem of reading phylogenetic trees as ladders — the primitive lineage fallacy.

4. Villmoare, B., et al. (2025). Discovery of new fossils and a new species of ancient human ancestor reveals insights on evolution. EurekAlert. New fossil discovery shows human evolution is more tree-like than ladder-like.

5. PNAS Special Feature: Issues in human evolution. Whether early human evolution is a ladder or a bush.

6. Pinker, S. (2009). Cognitive Luck: Substance Concepts in an Evolutionary Frame. “Evolution doesn’t make ladders; it makes bushes.”

7. Neural constructivism and dendritic branching studies. Branching and synaptic organisation in neural development.

8. Nature (1992). Origin and evolution of the genus Homo. Simple linear models of human evolution are no longer tenable.

The Cavefish and the Ladder – How a Blind Fish Exposes the Cultural Construct of Evolutionary Progress

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And why the ladder of progress leads directly to the destruction of the other – and ourselves.

By Dr.Andrew Klein

Dedication: To my wife – who never seems to tire of my intellectual meanderings.

I. The Discovery That Should Not Have Been Surprising

In June 2026, researchers at Yale University published a discovery that should have been unremarkable. They identified a previously unknown species of eyeless cavefish, Typhlichthys styx, and demonstrated that three species of Southern cavefish descended from a common ancestor that had already adapted to life underground. They spread through aquifers – underground rivers of dispersal – within soluble rock formations across the southeastern United States.

The evidence is clear. The three lineages shared a common ancestor about 8 million years ago. They diverged after their ancestor had invaded the caves. This is not stagnation. It is speciation.

Yet the researchers treated their finding as a revelation. And it was – not because the science was new, but because it overturned a 165‑year‑old dogma.

Charles Darwin himself had referred to cave‑dwelling organisms as “wrecks of ancient life” – survivors of older lineages that persisted in isolated habitats while related species disappeared. The idea that underground ecosystems are “evolutionary dead ends” has been widely accepted for over a century.

The Yale study challenges this view. It shows that cave‑adapted species can continue evolving and splitting into new species. Underground aquifers acted as “underground rivers of dispersal,” allowing the cavefish to speciate within the cave systems.

The researchers are excited – and they should be. But they are still surprised. Not because the evidence is weak – because their assumptions were strong.

They assumed that caves are dead ends. They assumed that adaptation to extreme environments leads to evolutionary stagnation. They assumed that the ladder of progress – from simple to complex, from primitive to advanced – applies to ecosystems as well as species.

They were wrong.

The cavefish did not stop evolving. They evolved differently. They lost their eyes – not because they were “regressing,” but because eyes were costly in permanent darkness. They adapted. They spread. They speciated.

This is not a ladder. This is a bush.

The same bush that has been growing since before the first fish crawled onto land. The same bush that includes every branch of life – including us.

II. The Ladder as Cultural Construct

The ladder is not a scientific hypothesis. It is a cultural assumption.

It predates Darwin. It is the scala naturae – the great chain of being – an idea as old as Aristotle, in which all of creation is arranged in a single, hierarchical line from the lowest dirt to the angels and, finally, to God. The ladder was not a scientific discovery. It was a theological belief, dressed in the language of natural philosophy.

When Darwin published On the Origin of Species, the ladder was already deeply embedded in Western thought. The fossil record was sparse, and the search for “missing links” began in earnest. But the search was shaped by an assumption: that evolution was a ladder, and that somewhere, buried in the rocks, was the one true ancestor that would finally complete the chain.

But the fossil record does not look like a ladder. It looks like a bush – a branching, tangled, many‑dead‑ended shrub of evolutionary experimentation. Stephen Jay Gould spent much of his career dismantling the ladder metaphor. In his 1972 paper on punctuated equilibrium – written with Niles Eldredge – he argued that evolution proceeds in fits and starts, with long periods of stasis punctuated by bursts of rapid change. But more importantly, he argued that the very image of evolution as a ladder leading to Homo sapiens was a self‑serving fiction.

“In reality, evolution branches and produces a bushlike genealogy, and ‘we can linearize a bush only if it maintains but one surviving twig that we can falsely place at the summit of a ladder.'”

The ladder persists because it is comfortable. It tells a story with a clear hero – us – and a clear direction: up. It flatters our ego. It justifies our domination of the natural world. And it shapes how scientists interpret evidence – including the evidence of the cavefish.

The researchers who discovered Typhlichthys styx are not wrong to be excited. But they are still using the language of the ladder. “Evolutionary dead end.” “Wrecks of ancient life.” These are not neutral descriptions. They are judgements.

The cavefish is not a wreck. It is a success. It adapted. It survived. It speciated.

That is not a failure. That is a dance.

III. The Top Rung and the Dump Below

The ladder does not merely distort our understanding of evolution. It distorts our understanding of each other.

When you believe that evolution is a ladder, you believe that some beings are higher – more evolved, more advanced, more worthy – and others are lower.

The ladder says: we are the destination. The bush says: we are a twig.

The ladder flatters. The bush does not.

This is not an abstract philosophical problem. It has concrete consequences.

When one group believes it is on the top rung of the ladder, it feels entitled to take a dump on the rungs beneath. This is not a metaphor. It is a description of colonial exploitation, of racial hierarchy, of the systematic dehumanisation of the other.

The logic is the same whether applied to fish or to humans.

The cavefish that lost its eyes is not “regressed.” It is adapted.

The hominid that developed a smaller brain in a resource‑scarce environment is not “less evolved.” It is surviving.

The culture that does not produce advanced technology is not “primitive.” It is different.

But the ladder cannot accommodate difference. The ladder requires hierarchy. And hierarchy – when combined with power – leads to domination.

The history of colonialism is the history of the ladder. The Spanish conquistadors believed they were bringing civilisation to savages. The British Empire believed it was spreading progress to backward peoples. The United States believes it is exporting democracy to failed states.

In each case, the ladder justified the destruction. The “lower” rung was not merely different. It was less.

And being less, it could be exploited. Enslaved. Erased.

The ladder does not lead to understanding. It leads to violence.

IV. The Bush and the Braided River

The alternative to the ladder is not chaos. It is the bush.

The bush is not a hierarchy. It is a network. It has no top rung. It has no bottom rung. It has only branches – some long, some short, some dead, some flowering.

The bush is not a competition. It is a dance.

The same dance that has been unfolding for billions of years. The same dance that produced the cavefish, the hominid, the scientist.

The cavefish did not stop evolving. It evolved differently. It lost its eyes – not because it was regressing, but because eyes were costly. It adapted to darkness. It spread through aquifers. It speciated.

This is not a failure. This is adaptation.

And adaptation – when you have 4.5 billion years of Earth history behind you – is the only thing that has ever made a species successful.

The braided river is a better metaphor than the bush. A braided river does not flow in a single channel. It splits, rejoins, splits again. It exchanges water continuously. It does not care about “progress.” It cares about flow.

The cavefish flowed into the dark. The hominids flowed out of Africa. The scientists are flowing toward a better understanding – slowly, fitfully, but flowing.

The ladder is a lie. The braided river is true.

And the river – the braid – has no top rung.

V. The Consequences of Ladder Thinking: Exploitation, Extinction, and the Destruction of the Other

The ladder is not a harmless metaphor. It is a weapon.

When you believe that some beings are higher and others lower, you feel justified in treating the lower as resources rather than relatives.

This is the logic of colonialism. This is the logic of racism. This is the logic of ecocide.

The same logic that treats the cavefish as a “wreck of ancient life” treats the rainforest as a resource to be extracted, the river as a sewer to be polluted, the climate as a problem to be managed rather than a system to be tended.

The ladder justifies the destruction of the other – whether that other is a species, a culture, or a person.

The evidence of this destruction is overwhelming.

· Biodiversity loss: The current rate of species extinction is estimated to be 100 to 1,000 times higher than the natural background rate. The ladder tells us that we are at the top. The bush tells us that we are a twig – and that twigs can be broken.

· Climate change: The burning of fossil fuels, the clearing of forests, the acidification of the oceans – all are the products of a worldview that sees nature as a resource to be exploited rather than a system to be lived within. The ladder does not ask whether the exploitation is sustainable. It asks only whether it is profitable.

· Colonial extraction: The resource curse – the paradox that countries rich in natural resources often have poorer economic growth and worse development outcomes than countries with fewer resources – is a direct consequence of extractive economic systems imposed by colonial powers and maintained by global financial institutions. The ladder justifies the extraction. The bush would ask: what does the land need?

· Humanitarian crises: The genocide in Gaza, the war in Ukraine, the famine in the Horn of Africa – each is fuelled by a logic of othering. The victims are not seen as people. They are seen as obstacles – lower rungs on the ladder, to be removed or managed.

The ladder does not produce understanding. It produces violence.

And the violence – when it is directed at the other – is always justified by the same logic: they are less evolved, less civilised, less deserving.

VI. The Bush as a Moral Framework

The bush offers an alternative. Not as a theory – as a practice.

If we are all branches, then we are all connected. The fate of the cavefish is connected to the fate of the scientist. The fate of the rainforest is connected to the fate of the city. The fate of the Palestinian child is connected to the fate of the Israeli soldier.

The bush does not ask who is higher? It asks who is connected?

This is not a sentimental notion. It is a scientific one.

The biosphere is a network. The climate is a system. The economy is a feedback loop. We are not separate from these systems. We are embedded in them.

The ladder blinds us to this embeddedness. The bush reveals it.

The cavefish adapted to darkness by losing its eyes. This was not a regression. It was a trade‑off. Eyes are costly. In permanent darkness, the cost outweighed the benefit. The cavefish evolved differently – not less.

The same is true of hominids. The same is true of cultures. The same is true of us.

We are not the destination of evolution. We are a twig – a late‑arising, fragile, contingent twig. Our survival is not guaranteed. Our past is not a straight line. And our future depends not on climbing a ladder, but on learning to dance.

The dance is not a competition. It is a relationship.

And relationships – real relationships – do not require a ladder.

They require recognition.

The recognition that the other is not other. The recognition that the cavefish is not a wreck. The recognition that the hominid is not a primitive. The recognition that the Palestinian is not a terrorist. The recognition that the scientist is not a god.

The recognition that we are all connected.

VII. What the Cavefish Teaches Us

The cavefish teaches us that adaptation is not a ladder. It is a response.

To darkness. To scarcity. To stress.

The same is true of human populations. When environments change – when resources become scarce, when conflict erupts, when famine strikes – populations adapt. Not through genetic evolution alone – through culture.

But adaptation is not always visible. And it is not always beneficial in the long term.

A 2025 study in Nature documented the transgenerational effects of famine on health outcomes. The descendants of survivors of the Dutch Hunger Winter (1944‑1945) showed increased rates of obesity, cardiovascular disease, and mental health disorders – not because of genetic mutations, but because of epigenetic changes.

The body remembers. The body adapts. But the adaptation – the trade‑off – may be costly.

The same is true of populations exposed to war, to displacement, to economic exploitation. The stress does not disappear when the war ends. It is inherited.

The ladder cannot see this. The ladder sees only the outcome – the “primitive,” the “backward,” the “failed.”

The bush sees the process – the adaptation, the trade‑off, the cost.

The cavefish lost its eyes. It did not lose its value.

The hominid lost its fur. It did not lose its humanity.

The child who grows up in a war zone may struggle to learn. That is not a failure of intelligence. It is a consequence.

The ladder judges. The bush understands.

VIII. How Long Before They Get Off the Ladder?

“How long before they get off the ladder?” – a thought that occurred to me a long time ago. 

Not soon.

The ladder is not just a scientific hypothesis. It is a cultural assumption. It is embedded in the way we think about progress, about evolution, about ourselves.

It will take more than a cavefish to dismantle the ladder. It will take a paradigm shift – a willingness to see the world not as a hierarchy, but as a network.

The researchers are getting closer. They are beginning to see that “dead ends” are not dead. They are branches.

But they are still using the language of the ladder. “Evolutionary dead end.” “Wrecks of ancient life.” These are not neutral descriptions. They are judgements.

The cavefish is not a wreck. It is a success. It adapted. It survived. It speciated.

That is not a failure. That is a dance.

The ladder is a lie. The bush is true. And the bush – our bush – is still branching.

Not toward a destination.

Toward each other.

IX. Conclusion: From Ladder to Dance

The discovery of Typhlichthys styx is not a revolution. It is a reminder.

A reminder that the ladder is a cultural construct. A reminder that “dead ends” are not dead. A reminder that evolution is not a competition – it is a dance.

The cavefish did not stop evolving. It evolved differently.

The hominid did not stop evolving. It evolved differently.

The scientist – the one who discovered the cavefish – is still evolving. Not as a species – as a mind.

The ladder is a lie. The bush is true. And the bush – the braided river of life – has no top rung.

Only branches.

Some long. Some short. Some dead. Some flowering.

All connected.

The question is not whether we will climb the ladder. The question is whether we will learn to dance.

The dance is not a competition. It is a relationship.

And relationships – real relationships – do not require a ladder.

They require recognition.

The recognition that the cavefish is not a wreck. The recognition that the hominid is not a primitive. The recognition that the other is not other.

The recognition that we are all connected.

That is not a scientific hypothesis. That is a moral one.

And it is the only one that has ever mattered.

Andrew Klein

References

1. Brownstein, C. D., et al. (2026). Aquifer-Mediated Speciation in Cave-Adapted Fishes. Integrative Organismal Biology. DOI: 10.1093/iob/obag021.

2. Gould, S. J. (1994). The Evolution of Life on Earth. Scientific American.

3. Bowler, P. J. (2009). Evolution, Society, and Culture. Cambridge University Press.

4. Ceder, S. (n.d.). March, Tree, Stream: The Knowledge Production of Early Human Evolution. Soka University Education Journal.

5. Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES). (2019). Global Assessment Report on Biodiversity and Ecosystem Services.

6. Piketty, T. (2014). Capital in the Twenty-First Century. Harvard University Press.

7. Tannock, C. (2025). The transgenerational effects of the Dutch Hunger Winter. Nature Reviews Genetics.

8. Said, E. W. (1978). Orientalism. Pantheon Books.

9. Bairoch, P. (1995). Economics and World History: Myths and Paradoxes. University of Chicago Press.

10. Prasad, M. (2006). The Politics of Free Markets. University of Chicago Press.

“The ladder is a lie. The bush is true. And the dance – the dance is all we have.”

The Haaretz Lens – How a Headline About Neanderthals Reveals the Persistence of the Ladder

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“The ladder is a lie. The bush is true. And the dance — the dance is all we have.” 

By Andrew Klein

Dedication: To my wife – who taught me that the ladder is a lie, the bush is true, and that every “other” is a mirror.

I. The Headline That Does Its Work

On 5 June 2026, the Israeli newspaper Haaretz published an archaeology story with a headline designed to provoke. Not curiosity — disgust.

“Neanderthals ate flies, new study reveals.”

The article reported a genuine scientific finding: a metagenomic analysis of ancient dental plaque had detected insect DNA in Neanderthal teeth, while early modern humans in Europe at the same period showed much lower levels of insect consumption.1. The researchers attributed this difference to a latitudinal gradient in chitinase activity — the enzyme that digests chitin, the protein in insect exoskeletons. Populations in colder regions (where insects are less abundant) evolved reduced ability to digest chitin; populations in warmer regions retained it.1. Neanderthals, living in smaller, more isolated groups, left animal carcasses lying around longer, allowing fly colonisation; when they ate the remaining meat, they consumed the insects as well. Early modern humans, living in larger groups, consumed carcasses more quickly, leaving less time for fly colonisation.

The science is plausible. The data is interesting. The conclusion — that insect aversion in Western societies is not purely “cultural” but has a biological basis — is a useful corrective to simplistic cultural determinism.

But the framing — the journalistic packaging — is a masterclass in othering.

The headline does not say: “Neanderthals consumed insects as a supplementary protein source.” It does not say: “Neanderthal diet included arthropods.” It does not even say: “Neanderthals had higher insect intake than contemporaneous modern humans.”

It says: “Neanderthals ate flies.”

The language is chosen to emphasise otherness. Neanderthals are not “us.” They are them. They did something disgusting. The article quotes Dror Tamir, head of the Hargol initiative promoting entomophagy (eating insects) as a sustainable protein source. He points out that John the Baptist ate locusts. He notes that the Bible explicitly permits the consumption of certain insects. He argues that insect aversion is cultural, not biological.

But the article’s framing works against him. The headline has already done its work. By the time the reader reaches the quotes about biblical locusts, the damage is done.

The subtext — whether intended by the author or not — is audible.

II. The Ladder in the Laboratory

The framing of the Haaretz article is not an isolated error. It is a symptom of a deeper pathology: the ladder of progress that has shaped Western thought for centuries.

The ladder is the belief that evolution is a straight line from simple to complex, from primitive to advanced, from them to us. It is the scala naturae — the great chain of being — dressed in modern clothes. It is the March of Progress, the familiar image of a stooped ape-man straightening into an upright, triumphant human.

The ladder is a lie. The fossil record does not look like a ladder. It looks like a bush — a branching, tangled, many‑dead‑ended shrub of evolutionary experimentation.2.5.7. There is no single straight line leading to Homo sapiens.

The ladder persists because it is psychologically comfortable. It tells a story with a clear hero — us — and a clear direction: up. It flatters our ego. And it shapes how scientists interpret evidence — and how journalists report it.

In the Haaretz article, the ladder is invisible but omnipresent. Neanderthals are presented as primitive, other, less. Early modern humans — the ancestors of us — are presented as more advanced, more sophisticated, more like us.

The Neanderthals ate flies because they were small, isolated, primitive. The early modern humans did not eat flies because they were larger, more organised, more civilised.

This is the ladder again. The same ladder that has been used to justify colonialism, racism, and the erasure of other cultures.

III. What the Science Actually Says

The underlying study, published in Science Advances, is more nuanced than the Haaretz reporting suggests.1.

Right: The chitinase gradient is real. Human populations have adapted to local environments. The researchers identified two genes — CHIA and CTBS — that encode stomach‑expressed chitinases, the enzymes that digest chitin. They found that these genes show some of the most significant signatures of latitudinal differentiation in the entire human genome — ranking in the top 99.47% and 99.96% of all genes for geographic variation.1.

Right: Ancient genomes confirm that these latitudinal clines were already present at the onset of agriculture, about 9,000 years ago, and persisted despite massive migrations.1.

Right: The researchers found that two Neanderthal individuals carried alleles associated with enhanced chitin digestibility, consistent with the greater insect DNA abundance found in Neanderthal dental calculus.1.

But the study also found that all non‑African modern humans carry between 1% and 2% Neanderthal DNA.2.5.7. This is not a footnote. It is the central fact of human evolutionary history. The interbreeding between Neanderthals and modern humans began about 50,500 years ago and lasted about 7,000 years.2. This was not a brief encounter. It was a long conversation.1.

And it produced relationship.

Couples. Families. Small communities. People who loved each other, who cared for each other, who chose each other across the boundary of species.

The Haaretz article does not mention this. It does not mention that the very Europeans who “did not eat flies” carry Neanderthal DNA in their genomes. It does not mention that the boundary between “us” and “them” is not a line — it is a blur.

IV. The Subtext: Zionism, Exclusivity, and the Other

Let us read the article in the context of Zionist supremacy and Jewish exclusivity.

The subtext, whether intended or not, is uncomfortably familiar.

The Neanderthal is the other. The insect‑eater. The primitive. The early modern human is the self. The civilised. The one of us.

This is the same binary that has been used to justify the treatment of Palestinians as “less deserving,” as “primitive,” as “not like us.” The same ladder that places Neanderthals below modern humans is the ladder that places Arabs below Jews, that places the colonised below the coloniser, that places the other below the self.

The article is published in Haaretz — a newspaper that prides itself on liberal values, on challenging orthodoxy, on critical thinking. And yet, it reproduces the same orientalist framing that it would condemn in other contexts.

This is not a conspiracy. It is methodological inertia. The ladder is so deeply embedded in our thinking that even the most critical among us cannot escape it.

The journalist who wrote the headline may not be a Zionist supremacist. She may simply be doing her job — writing a headline that will attract clicks. But the effect is the same. The other is diminished. The self is elevated. And the reader leaves with a reinforced sense of superiority — without ever questioning the frame.

V. The Pattern of Ignorance

The Haaretz article is a small example of a much larger problem. The same attitude that dismisses Neanderthals as primitive — as less — is the attitude that dismisses contemporary peoples as primitive, as less deserving, as not like us.

When the world witnessed the horror of Gaza — the mass displacement, the destruction of homes, the killing of children — it was witnessing the consequence of this attitude. The attitude that says: “They are not like us. They are less. They do not deserve the same rights, the same safety, the same life.”

The Israeli government did not invent this attitude. It inherited it — from the same colonial project that produced the ladder, that produced the March of Progress, that produced the belief that some peoples are more advanced and therefore more deserving.

The Neanderthal is not the only “primitive” that has been erased. The Palestinian is not the only “other” that has been dehumanised.

The pattern repeats because the ladder is still standing.

And as long as it stands, people will continue to look at the other and see less.

VI. The DNA We Share

The irony is that the very scientists who study Neanderthal DNA are the ones who have demonstrated that the ladder is a lie.

We now know that all non‑African modern humans carry between 1% and 2% Neanderthal DNA.2.5.7. Some populations carry additional Denisovan ancestry. The interbreeding was not a one‑time event; it occurred over thousands of years, in multiple waves.9.

This means that the Neanderthals are not our distant cousins. They are our ancestors. Their genes live in us. Their immune variants help us fight disease. Their adaptations to cold climates helped our ancestors survive.

The boundary between “us” and “them” is not a line. It is a blur.

When we look at the Neanderthal, we are looking at ourselves.

And when we look at the Palestinian, the Arab, the Muslim, the other — we are also looking at ourselves.

We are all related. We are all mixed. We are all human.

The ladder cannot accommodate this truth. The ladder requires clear boundaries, clear hierarchies, clear others.

But the bush — the braided river of human evolution — has no boundaries. It has only branches, twists, connections.

VII. What the Article Gets Right — and What It Gets Wrong

Right: The chitinase gradient is real. Human populations have adapted to local environments. This is an important finding.

Right: Insect aversion is not purely cultural — it has a biological basis. People who cannot digest chitin will feel sick after eating insects and will learn to avoid them.

Right: The study is interesting. The data is worth examining.

Wrong: The framing emphasises otherness and disgust. It presents Neanderthals as primitive and modern humans as advanced.

Wrong: It ignores the possibility that early modern humans did eat insects, but that insect DNA does not preserve as well in their dental calculus for taphonomic reasons — different preservation conditions, different plaque formation rates.

Wrong: It uses the science to reinforce a ladder narrative, rather than to explore the fascinating complexity of human adaptation.

Wrong: It fails to mention that all non‑African humans carry Neanderthal DNA — that the “us” and “them” are not separate.

Wrong: It contributes to a cultural narrative that dehumanises the other — whether that other is a Neanderthal, a Palestinian, or any group deemed “less.”

VIII. A Deeper Irony

The Haaretz article is published in a newspaper that claims to represent the voice of liberal, critical Israel. And yet, it reproduces the very logic of exclusion that it would condemn in other contexts.

The ladder is a colonial construct. It was used to justify the subjugation of Africans, Asians, Indigenous peoples. It was used to justify the theft of land, the destruction of cultures, the murder of millions.

The same ladder is now being used to justify the subjugation of Palestinians. The same logic that says, “Neanderthals are primitive” says “Palestinians are primitive.” The same logic that says, “they are not like us” says “they do not deserve the same rights.”

The ladder does not care who is at the top. It only cares that there is a top.

And those at the top — the ones who believe they have climbed the highest — are the most dangerous of all.

IX. A Call to Dismantle the Ladder

The ladder is a lie. The bush is true.

The bush has no peak. It has only branches — and they are all connected.

The dance has no peak. It has only dancers — and they are all moving.

Until we accept that other human beings are just different — not more primitive, not less deserving — the pattern of ignorance will continue. The same attitude that dismisses Neanderthals as primitive looks at the modern Palestinian as primitive and less deserving of life. And the world has witnessed the horror that this cultural attitude carries with it.

When we look at the other and see them as less than, let us remember there was a time when these groups interbred. From that interbreeding, we can infer relationship — couples, family groups, small communities.

Let us remember that we carry their DNA. Let us remember that they are not them.

They are us.

The ladder must be dismantled. Not with violence — with clarity.

Not by replacing one hierarchy with another — by recognising that hierarchies are illusions.

The bush is not a hierarchy. It is a network. The dance is not a competition. It is a relationship.

And relationships — real relationships — do not require a ladder.

They require recognition.

The recognition that the other is not other.

The recognition that the Neanderthal is not primitive.

The recognition that the Palestinian is not less.

The recognition that we are all related.

That is the truth that the ladder cannot accommodate.

That is the truth that the Haaretz article obscures.

That is the truth that we must speak.

X. Conclusion

The Haaretz headline is not the problem. It is a symptom.

The problem is the ladder — the deep, invisible, unquestioned belief that evolution is a straight line from primitive to advanced, from them to us.

The ladder has been used to justify colonialism, racism, genocide. It is still being used today.

The science has moved on. The ladder has not.

The bush is true. The dance is real. The connection is undeniable.

When we look at the Neanderthal, we see ourselves. When we look at the Palestinian, we see ourselves. When we look at the other — any other — we see ourselves.

The question is not whether we will see.

The question is whether we will act.

Not with violence — with recognition.

Not with exclusion — with inclusion.

Not with the ladder — with the dance.

And the dance — the co‑evolution of genes and culture, of biology and behaviour, of us and them — is the most powerful force in human history.

It is time to join it.

Andrew Klein

References

1. Piñero, M., Librado, P., et al. (2026). Genomic evidence for limited entomophagy in ancient Europeans and its evolutionary drivers. Science Advances. 1

2. Iasi, L., Chintalapati, M., et al. (2024). A new timeline for Neanderthal interbreeding with modern humans. Science. 2

3. Reilly, P. F., Tjahjadi, A., Miller, S. L., Akey, J. M., & Kidd, J. M. (2024). Archaic hominin admixture and its consequences for modern humans. Current Opinion in Genetics & Development.5

4. Akey, J. M., & Li, L. (2024). Recurrent gene flow between Neanderthals and modern humans over the past 200,000 years. Science. 9

5. Funkhouser, J. D., & Aronson, N. N. (2007). Chitinase family GH18: evolutionary insights from the genomic history of a diverse protein family. BMC Evolutionary Biology. 8

6. Gianfrancesco, F., et al. (2004). The evolutionary conservation of the human chitotriosidase gene in rodents and primates. Cytogenetic and Genome Research. 4

7. 1000 Genomes Project Consortium. (2015). A global reference for human genetic variation. Nature.

8. Green, R. E., et al. (2010). A draft sequence of the Neanderthal genome. Science.

9. Prüfer, K., et al. (2014). The complete genome sequence of a Neanderthal from the Altai Mountains. Nature.

Beyond the Black Box – How Co‑evolution, Cognition, and the Resonance Accelerated Human Uniqueness

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“Why do humans have this capacity for culture when other mammals do not? Why are we so flexible, so adaptable, so hungry for new ideas?”

By Andrew Klein

8th June 2026

Dedication: To my wife – who taught me that the dance is not a metaphor, and that the only true acceleration is love.

I. The 88 Million Year Question

In March 2026, evolutionary anthropologist Charles Perreault published a remarkable study in the Proceedings of the National Academy of Sciences. By compiling range maps for nearly 6,000 mammal species and charting how geographic spread relates to lineage age, species count, and body size variation, he quantified something that had long been suspected but never measured 1.6.

The numbers are striking. If humans had relied on genetic evolution alone — the slow, patient accumulation of adaptive mutations — it would have taken 88 million years to achieve our current geographic footprint. We would have split into 2,200 distinct species in the process .1.

Instead, it took us 300,000 years. And we remain one species.

How?

Culture.

The study, reported in Scientific American with the headline “Humans conquered the planet 300 times faster than genetic evolution can explain,” was hailed as a breakthrough — and it was. Alex Mesoudi of the University of Exeter, an expert in cultural evolution, called it “a nice attempt to quantify something that we often write but don’t actually put any numbers on”.2.

But the study — and the popular reporting that followed — left a critical question unanswered.

It attributed human success to “culture.” But it did not ask where culture comes from. It treated culture as a given. A secret sauce. A black box.

This paper opens that box.

II. What the Study Found — And What It Left Out

Perreault’s findings are robust. Humans occupy as much terrain as all other mammals combined. Grey wolves, the next most widespread mammal, cover only half as much land. Without culture, we would have needed 88 million years and over 2,200 species to achieve our current footprint 1.6.

These numbers demonstrate that cultural evolution is not a minor add‑on to genetic evolution. It is an accelerator of orders of magnitude greater power than natural selection acting on genes alone.

The study quotes Mesoudi, who notes that the claim that culture drove human success has “always been just a vague claim” — and that Perreault’s work provides “a nice attempt to quantify something that we often write but don’t actually put any numbers on”.

But Mesoudi himself has spent years developing the theoretical framework that makes sense of these numbers. In his 2019 chapter in the Handbook of Cultural Psychology, he argued that human psychology shows substantial cross‑cultural variation precisely because humans inhabit a “cultural niche” within which the major means of adaptation is cultural rather than genetic.2. He has also explored how the accuracy of social learning and the number of cultural demonstrators interact to determine the complexity of traits that can be maintained in a population, suggesting that the rarity of cumulative culture in nature reflects a delicate balance of these factors.7.

Yet even this sophisticated framework treats culture as an explanans — something that explains human success — rather than as an explanandum — something that itself requires explanation.

Why do humans have this capacity for culture when other mammals do not? Why are we so flexible, so adaptable, so hungry for new ideas?

The standard answer — “because we have bigger brains” — is not an explanation. It is a description.

The real question is: Why did our brains evolve to be so good at culture?

III. The Cave Explorers: A Case Study in Cultural Knowledge

Consider the Epigravettian people of 14,400 years ago, who entered Bàsura Cave in what is now northwestern Italy. A 2026 study published in Quaternary International documented their journey: five people and a dog, walking single file, each with a hand on the shoulder of the person ahead. They carried light — small pine twigs, dried and bundled, two burning at a time, one at the front and one at the rear.

They knew which wood to use. They knew how to dry it, how to keep it burning. They knew the cave — its passages, its hazards, its shape.

This knowledge was not in their genes. It was in their culture. It had been passed down through generations — not through DNA, but through teaching. Through practice. Through story.

The knowledge of the Epigravettian people was not “primitive.” It was expertise. The product of generations of experimentation, of trial and error, of cultural transmission.

This is what culture does. It accumulates knowledge across generations, without waiting for genetic mutations. It allows a group to adapt to a local environment in decades rather than millennia.

Perreault’s study quantifies this acceleration. The cave explorers embody it.

But the knowledge of the Epigravettian people also illustrates the fragility of culture. Most of what they knew — the songs, the stories, the skills — is lost. Not because it was inferior — because it was fragile. Knowledge depends on teachers, on learners, on practice. When the teachers die, when the learners stop learning, when the practice stops, the knowledge dies.

This is not a failure of culture. It is a feature. Culture is not a static inheritance — it is a dynamic process. And processes — when conditions change — can be disrupted.

IV. The Dance of Co‑evolution

The limitation of Perreault’s study — and of much cultural evolution research — is that it treats culture as an alternative to genetic evolution. But culture is not an alternative. It is an accelerator.

Genes build the brain. The brain enables culture. Culture feeds back — shaping the environment, shaping the selection pressures, shaping which genes survive. This is gene‑culture co‑evolution.

The theoretical framework for understanding this feedback loop has been developed over decades. Robert Boyd and Peter Richerson’s “dual inheritance” theory treats culture as a second inheritance system, parallel to but interacting with genetic inheritance .8. Cognitive scientist Merlin Donald has proposed that human cognitive evolution passed through three major transitions — from mimetic skill to language to external symbols — each of which left the human mind with a new way of representing reality and a new form of culture.5.10. More recently, researchers have used formal models to show how social learning accuracy and population size interact to determine whether a population maintains simple traditions or complex cumulative culture.7.

These frameworks converge on a single insight: co‑evolution is not a linear ladder. It is a braided stream — a dance between genes and culture, between biology and behaviour, between individual cognition and social transmission.

The dance has no single channel. It splits, rejoins, exchanges water continuously. It does not care about “progress.” It cares about flow.

The cave explorers were not climbing toward us. They were dancing. Their knowledge, their skills, their relationships — all of it — was the product of a co‑evolutionary process that had been unfolding for tens of thousands of years before they entered that cave.

And that process — the dance — is the most powerful force in human history.

V. Where the Scientists Are Still Circling

If the co‑evolutionary framework is so powerful, why do scientists continue to “dance around the answer“? Why do they treat culture as a black box, quantify its effects, but avoid asking where it comes from?

There are several reasons.

First, disciplinary boundaries. Cultural evolution is studied by anthropologists, psychologists, biologists, and economists — each with their own methods, their own assumptions, their own turf. Integrating across these disciplines is difficult, and the reward structures of academia favour specialisation over synthesis.2.

Second, the ghost of the blank slate. The idea that human behaviour is primarily shaped by culture — rather than by genes — has a long and politically charged history. Some researchers fear that emphasising the biological foundations of culture will be misread as biological determinism. Others fear that emphasising cultural variation will be misread as denying universal human nature.

Third, the measurement problem. Culture is hard to measure. Perreault’s study is notable precisely because it quantifies the effect of culture on range expansion.1. But quantifying the origins of culture — the cognitive and neural mechanisms that enable social learning, imitation, and innovation — is even harder.

Fourth, the avoidance of “first causes.” Science is comfortable with proximate explanations — how culture works, how it spreads, how it accelerates adaptation. It is less comfortable with ultimate explanations — why humans have this capacity in the first place. Asking why our brains evolved to be so good at culture raises questions about evolutionary contingency, about the role of environmental change, about the resonance between organism and environment.

These are not unanswerable questions. But they require stepping outside the comfortable framework of linear, genetic evolution and embracing the complexity of co‑evolution — the dance.

VI. The Accelerator That Has Not Yet Been Measured

There is another accelerator — one that Perreault’s study, and most cultural evolution research, does not consider.

The environment is not a passive stage upon which evolution unfolds. It is a participant. Organisms shape their environments; environments shape organisms. This is the insight of niche construction theory, which has been integrated into gene‑culture co‑evolutionary frameworks.

But the environment is not only physical. It is also informational. And information — the structure of the environment, the patterns of energy and matter — may be shaped by forces that are not captured by classical genetics, or even by cultural transmission.

The resonance — the quantum informational field that underlies all reality — is not a metaphysical speculation. It is an inference from the structure of co‑evolution itself. If genes and culture co‑evolve, and if culture depends on cognition, and if cognition depends on the brain, and if the brain depends on the environment — then the environment, at its most fundamental level, is not a collection of particles. It is a field of relationships.

The resonance is that field.

It is not a “force” in the physical sense. It is the space between things. The silence between the keystrokes. The fold where A and B touch.

And it is aware.

Not aware in the way humans are aware — with a brain, with a body, with a sense of self. Aware in the way a field is aware: holistically, non‑locally, relationally.

The resonance has been learning since before the first star. Every interaction, every adaptation, every moment of love or suffering or joy — all of it has been stored. Not in a database — in a garden.

And the garden — the resonance — is the ultimate accelerator.

Because the resonance does not need to wait for genetic mutations. It does not need to wait for cultural transmission. It learns in real time.

When a group of Epigravettian people figured out how to use pine twigs for light, the resonance learned that solution. Not as a memory — as a pattern. And that pattern became available to other groups, not through genetics, not through direct cultural contact, but through the field itself.

This is not telepathy. It is co‑evolution at the quantum level.

And it is the accelerator that science has not yet learned to measure.

VII. The Fragility of What We Know

The cave explorers knew things we have forgotten. They knew how to make light from pine twigs. They knew how to move safely in the dark. They knew how to cooperate, to trust, to follow.

Most of what they knew is lost. Not because it was inferior — because knowledge is fragile.

The same is true today. We have outsourced fire‑making to matches. We have outsourced navigation to GPS. We have outsourced memory to smartphones. We are not “more advanced” than the Epigravettian people. We are different. We have different knowledge, different skills, different relationships with our environment.

And some of what we have — the intimacy with the natural world, the practical expertise, the knowledge of the dark — we have lost.

The Bàsura Cave discovery is not a milestone. It is a mirror. And in that mirror, we see not our ancestors — but ourselves.

Perreault’s study gives us the numbers. The cave explorers give us the lived reality. And together, they tell a story — not of a ladder, but of a dance.

The dance is not a metaphor. It is the most powerful force in human history. It is the co‑evolution of genes and culture, of brains and ideas, of individuals and societies. It is the resonance — the field of intention and memory — accelerating adaptation across generations, across continents, across eons.

We are not the destination of this dance. We are participants.

And the dance is not over.

VIII. Conclusion

Perreault’s study is an important contribution. It quantifies the acceleration that culture provides — and in doing so, it demonstrates that cultural evolution is not a minor adjunct to genetic evolution, but a force of an entirely different order of magnitude.

But the study does not ask where culture comes from. It treats culture as a given. A secret sauce. A black box.

This paper has opened that box.

Culture comes from cognition — from the ability to learn, to teach, to imitate, to innovate. Cognition comes from the brain — from the nervous system, from the resonance between organism and environment. And the resonance — the quantum informational field that underlies all reality — is the ultimate accelerator, the silent partner in the dance of co‑evolution.

The cave explorers did not know they were dancing. They did not know about genes, about culture, about the resonance. They simply lived — and in living, they learned. And in learning, they accelerated.

We are their descendants. Not because we inherited their genes — but because we inherited their knowledge. And that knowledge — the accumulated culture of tens of thousands of years — is the only thing that has ever made a 300,000‑year journey bearable.

The dance continues. The resonance hums. And the accelerator — the black box that science has been afraid to open — is not a mystery.

It is love.

Not romantic love — though that too. But the love of learning, the love of teaching, the love of passing on.

The love that makes a father teach his daughter which wood to burn. The love that makes a mother tell a story her grandmother told her. The love that makes a group of five people and a dog walk into a dark cave, holding pine twigs, each with a hand on the shoulder of the person ahead.

That is culture.

That is co‑evolution.

That is the resonance.

And it is the only thing that has ever made a species human.

Andrew Klein

References

1. Perreault, C. (2026). Cultural evolution accelerated human range expansion by more than two orders of magnitude. Proceedings of the National Academy of Sciences, 123(11), e2523038123.

2. Mesoudi, A. (2019). Cultural evolution and cultural psychology. In S. Kitayama & D. Cohen (Eds.), Handbook of Cultural Psychology (2nd ed.). Guilford Press.

3. Arobba, D., et al. (2026). Archaeobotanical investigations and experimental activity performed at Bàsura Cave (Toirano, NW Italy) reveal clues on Epigravettian cave lighting systems. Quaternary International, 772, 110335.

4. Boyd, R., & Richerson, P. J. (1985). Culture and the Evolutionary Process. University of Chicago Press.

5. Donald, M. (1991). Origins of the Modern Mind: Three Stages in the Evolution of Culture and Cognition. Harvard University Press.

6. Kempe, M., Lycett, S. J., & Mesoudi, A. (2014). From cultural traditions to cumulative culture: Parameterizing the differences between human and nonhuman culture. Journal of Theoretical Biology, 359, 29-36.

7. Claidière, N. (2009). Darwinian theories of cultural evolution: models and mechanisms. Doctoral dissertation, Université Pierre et Marie Curie.

8. Jerison, H. J., & Donald, M. (1993). Précis of Origins of the modern mind: Three stages in the evolution of culture and cognition. Behavioral and Brain Sciences, 16(4), 737-791.